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A
Abalone jingle: See Pododesmus
macroschisma
Abarenicola
pacifica
Acanthephyra
curtirostris
Acanthina
spirata
Acanthodoris
nanaimoensis
Acmaea asmi: See Lottia
asmi
Acmaea digitalis: See Lottia
digitalis
Acmaea fenestrata: See Tectura
fenestrata
Acmaea
mitra
Acmea persona: See Tectura
persona
Acmaea scutum: See Tectura
scutum
Actiniaria
(Order)--Key
Acorn barnacle: See Balanus
glandula
Acorn worms: See Phylum
Hemichordata key
Adula
californiensis
Aeolidacea
(Suborder)--Key
Aeolidea papillosa: See Aeolidia
papillosa
Aeolidia farinacea: See Aeolidia
papillosa
Aeolidia
papillosa
Aequorea aequorea: See Aequorea
victoria
Aequorea flava: See Aequorea
victoria
Aequorea forskalea: See Aequorea
victoria
Aequorea
victoria
Aggregating anemone: See Anthopleura
elegantissima
Aggregating sea cucumber: See Pseudocnus
curatus
Aglaophenia
sp.
Agriodesma saxicola: see Entodesma
navicula
Alabaster nudibranch: SeeDirona
albolineata
Alaska abalone: See Haliotis
kamtschatkana
Alaska falsejingle: See Pododesmus
macroschisma
Alaska pink shrimp: See Pandalus
eous
Alaska spoonworm: see Echiurus
echiurus subspecies alaskanus
Alaskan gaper: See Tresus
capax
Alcyonaria
(Subclass)--Key
Alcyonidium
pedunculatum
Alectrion fossatus: See Nassarius
fossatus
Alpheidae
(Family)--Key
Amaroucium californicum: See Aplidium
californicum
Amaroucium solidum: See Aplidium
solidum
Amphipoda
(Order)--Key
Amphiodia barabarae: See Amphiodia
urtica
Amphiodia
urtica
Amphissa
columbiana
Anemones: See Order
Actiniaria
Angled hydromedusa: See Gonionemus
vertens
Anisodoris lentiginosa: See Peltodoris
lentiginosa
Anisodoris
nobilis
Anomura
(Infraorder)--Key
Antedon perplexa: See Florometra
serratissima
Antedon serratissima: See Florometra
serratissima
Anthopleura
artemisia
Anthopleura
elegantissima
Anthopleura
sola (not in key)
Anthopleura
xanthogrammica
Anthozoa
(Class)--Key
Antisabia cranioides: See Hipponix
cranioides
Aphrodita imbricata: See Harmothoe
imbricata
Aphrodita
japonica
Aphroditidae
(Family)--Key
Aplidium
californicum
Aplidium
solidum
Apple anemone: See Stomphia
didemon
Archidoris
montereyensis
Archidoris odhneri: See Doris
odhneri
Arctonoe
fragilis
Arctonoe
pulchra
Arctonoe
vittata
Arenicolid pea crab: See Pinnixa
eburna
Arenicolidae
(Family)--Key
Armed hermit: See Pagurus
armatus
Armina
californica
Arminacea
(Suborder)--Key
Armored ball sponge: See Geodia
mesotriaena
Armored sea cucumber: See Psolus
chitonoides
Ascidia
paratropa
Ascidiacea
(Class)--Key
Asterias koehleri: See Orthasterias
koehleri
Asterina miniata: See Patiria
miniata
Asteroidea
(Class)--Key
Aurelia aurita: See Aurelia
labiata
Aurelia
labiata
Austrodoris odhneri: See Doris
odhneri
B
Baby's ear: See Velutina
prolongata
Balanophyllia
elegans
Balanomorpha
(Suborder)--Key
Balanus cariosus: See Semibalanus
cariosus
Balanus
crenatus
Balanus
glandula
Balanus
nubilus
Balanus
rostratus
Bamboo worms: See Family
Maldanidae
Banded scale worm: See Arctonoe
vittata
Banded Tegula: See Tegula
eiseni
Banded turban snail: See Tegula
eiseni
Banner sea-nymph: See Nereis
vexillosa
Barentsia
robusta
Barnacles
Baseodiscus
princeps
Basket cockle: See Clinocardium
nuttallii
Basket shell: See Nassarius
fossatus
Bat star commensal worm: See Ophiodromus
pugettensis
Batillaria alterima: See Batillaria
attramentaria
Batillaria
attramentaria
Batillaria cumingi: See Batillaria
attramentaria
Batillaria zonalis: See Batillaria
attramentaria
Bay ghost shrimp: See Neotrypaea
californiensis
Bay mussel: See Mytilus
trossulus
Beach hoppers (Amphipod
family Talitridae)
Bell medusa: See Polyorchis
penicillatus
Bell-shaped jellyfish: See Polyorchis
penicillatus
Bentheogennema
burkenroadi
Bent-nosed clam: See Macoma
nasuta
Bernhardus armatus: See Pagurus
armatus
Bernhardus hirsutiusculus: See Pagurus
hirsutiusculus
Beroe cucumis: See Hormiphora
cucumis
Betaeus
harrimani
Bishop's cap limpet: See Acmaea
mitra
Bittium
eschrichtii
Bivalvia
(Class)--Key
Black-clawed crab Lophopanopeus
bellus bellus
Black limpet: See Lottia
asmi
Black tegula: See Chlorostoma
funebralis
Black top shell: See Chlorostoma
funebralis
Black turban snail: See Chlorostoma
funebralis
Blackeyed hermit: See Pagurus
armatus
Blister shell: See Pododesmus
macroschisma
Bladder clam: See Mytilimeria
nuttalli
Blood star: see Henricia
leviuscula
Blue mussel: See Mytilus
trossulus
Bobbit worm: See Eunice
valens
Bolinopsis alata: See Bolinopsis
infundibulum
Bolinopsis
infundibulum
Bolinopsis microptera: See Bolinopsis
infundibulum
Bolinopsis septentrionalis: See Bolinopsis
infundibulum
Boltenia
echinata
Boltenia
villosa
Bopyroides
hippolytes
Bottle clam: See Mytilimeria
nuttalli
Box crab: See Lopholithodes
foraminatus
Brown box crab: See Lopholithodes
foraminatus
Brachiopoda
(Phylum)--Key
Brachyura
(Infraorder)--Key
Branched Obelia: See Obelia
dichotoma
Bristly crab: See Telmessus
cheiragonus
Bristly tunicate: See Boltenia
villosa
Brittle stars: See Class Ophiuroidea
Broad-base sea squirt: See Cnemidocarpa
finmarkiensis
Broad-disk star: See Patiria
miniata
Broad six-rayed star: See Leptasterias
aequalis
Brooding transparent tunicate: See Corella
inflata
Brown tegula: See Chlorostoma
brunnea
Brown top snail: See Chlorostoma
brunnea
Brown tunicate: See Styela
gibbsii
Brown turban snail: See Chlorostoma
brunnea
Bryozoa
(Phylum)--Key
Bubble snail: See Haminoea
vesicula
Buccinidae
(Family)--Key
Bugula
californica
Buried Urticina: See Urticina
coriacea
Burkenroad blunt-tail shrimp: See Bentheogennema
burkenroadi
Burrow pea crab: See Scleroplax
granulata, Pinnixa
tubicola
Burrowing brittle star: See Amphiodia
urtica
Butter clam: See Saxidomus
gigantea
C
Cadilina
luteomarginata
Calcareous tubeworm: See Serpula
vermicularis
California armina: See Armina
californica
California beach flea: See Megalorchestia
californiana
California beach hopper: See Megalorchestia
californiana
California berthella: See Berthella
californica
California bryozoan: See Bugula
californica
California club-ray: See Corynactis
californica
California datemussel: See Adula
californiensis
California pea-pod borer: See Adula
californiensis
California piddock: See Parapholas
californica
California sand flea: See Megalorchestia
californiana
California sea cucumber: See Parastichopus
californicus
California sea pork: See Aplidium
californicum
Callianassa californiensis: See Neotrypaea
californiensis
Callianassidae
(Family)--Key
Calliostoma
annulatum
Calliostoma
ligatum
Calliostoma
variegatum
Callopora
horrida
Calyptraea
fastigiata
Calyptraeidae
(Family)--Key
Cancellate hairysnail: See Trichotropis
cancellata
Cancer antennarius: See Romaleon
antennarium
Cancer gracilis: See Metacarcinus
gracilis
Cancer magister: See Metacarcinus
magister
Cancer oregonensis: See Glebocarcinus
oregonensis
Cancer
productus
Cancridae
(Family)--Key
Candy-stripe shrimp: See Lebbeus
grandimanus
Caprella
angusta
Caprella augusta: See Caprella
angusta
Caprella uniforma: See Caprella
angusta
Caprellidea
(Suborder)--Key
Capulidae
(Family)--Key
Cardiidae
(Family)--Key
Caridea
(Infraorder)--Key
Cat's eye: See Pleurobrachia
bachei
Cauloramphus
spiniferum
Cephalaspidea
(Order)--Key
Cephalopoda
(Class)--Key
Ceratostoma foliata: See
Ceratostoma
foliatum
Ceriantharia (Tubedwelling anemones): See Pachycerianthus
fimbriatus
Cerithidiidae
(Family)--Key
Chalk-lined Dirona: SeeDirona
albolineata
Chamidae
(Family)--Key
Channeled basket whelk: See Nassarius
fossatus
Channeled dog whelk: See Nassarius
fossatus
Channeled dogwinkle: See Nucella
canaliculata
Channeled nassa: See Nassarius
fossatus
Channeled purple: See Nucella
canaliculata
Checkered hairysnail: See Trichotropis
cancellata
Cheilostomata
(Order of Bryozoans)--Key
Chelyosoma
columbianum
Chelysoma
productum
Childress' benthopelagic opossum shrimp: See Gnathophausia
childressi
Chinese hat limpet: See See Acmaea
mitra
Chinese hat snail: See Calyptraea
fastigiata
Chink shell: See Lacuna
variegata
Chionoecetes
bairdi
Chionoecetes opilio (south of Alaska): See
Chionoecetes
bairdi
Chlamys gigantea: See Crassodoma
gigantea
Chlamys
hastata
Chlamys
rubida
Chlorostoma
brunnea
Chlorostoma
funebralis
Chocolate limpet: See Tectura
fenestrata
Chorilia
longipes
Christmas anemone: See Urticina
crassicornis
Chrysaora
fuscescens
Chrysaora gilberti: See Chrysaora
fuscescens
Chrysaora helvola: See Chrysaora
fuscescens
Chrysaora melanaster: See also Chrysaora
fuscescens
Cirripedia
(Class)--Key
Cladodactyla miniata: See Cucumaria
miniata
Clams and mussels: See Class Bivalvia
Clam crab: See Fabia
subquadrata
Clam worm: See Nereis
vexillosa
Clavelina
huntsmani
Clinging jellyfish: See Gonionemus
vertens
Clinocardium
nuttallii
Clown nudibranch: See Triopha
catalinae
Clown shrimp: See Lebbeus
grandimanus
Cnemidocarpa
finmarkiensis
Cnemidocarpa joannae: See Cnemidocarpa
finmarkiensis
Cnesterium scissurata: See Yoldia
seminuda
Coastal spinyhead: See Metacrangon
munita
Cobbler crab: See Chionoecetes
bairdi
Cockerell's nudibranch: See Laila
cockerelli
Colorful six-rayed star: See Leptasterias
aequalis
Collisella asmi: See Lottia
asmi
Collisella digitalis: See Lottia
digitalis
Columbellidae
(Family)--Key
Columbian amphissa: See Amphissa
columbiana
Columbia sand anemone: See Urticina
columbiana
Colus
griseus
Comb jelly: See Pleurobrachia
bachei, Bolinopsis
infundibulum, Hormiphora
cucumis
Commensal scaleworm: See Arctonoe
fragilis
Common edible crab: See Metacarcinus
magister
Common grey sea slug: See Aeolidia
papillosa
Common jellyfish: See Aurelia
aurita
Common Pacific littleneck: See Leukoma
staminea
Common piddock: See Penitella
penita
Common rock crab: See Romaleon
antennarius
Common rock louse: See Ligia
pallasii, Ligia
occidentalis
Common sand dollar: See Dendraster
excentricus
Common two-spined crangon: See Neocrangon
communis
Concave isopod: See Idotea
resecata
Corals: See Order Scleractinia
Corella
inflata
Corrogated clam: See Humilaria
kennerlyi
Corynactis
californica
Crabs: See Infraorder
Brachyura for families of true crabs or Infraorder
Anomura for families of other crablike species
Crago munita: See Metacrangon
munita
Crago alaskensis: See Crangon
alaskensis
Crangon
alaskensis
Crangon
alba
Crangon communis: See Neocrangon
communis
Crangon munita: See Metacrangon
munita
Crangonidae
(Family)--Key
Cranopsis
cucullata
Crassodoma
gigantea
Crassostrea
gigas
Creeping pedal sea cucumber: See Psolus
chitonoides
Crenate barnacle: See Balanus
crenatus
Crepidula
adunca
Crepidula
perforans
Cribrella laeviuscula var. crassa:
See Henricia
pumila
Cribrinopsis
fernaldi
Crimson anemone: See Cribrinopsis
fernaldi
Crimson doris: See Rostanga
pulchra
Crisia
occidentalis
Crisscross yoldia: See Yoldia
seminuda
Cross jellyfish: See Mitrocoma
cellularia
Crossaster
papposus
Crusty red anemone: See Urticina
columbiana
Cryptochiton
stelleri
Cryptolithodes
sitchensis
Cryptolithodes
typicus
Cryptophyrs concharum: See Fabia
subquadrata
Ctenophora
(Phylum)--Key
Ctenostomata
(Order)--Key
Cucumaria albida: See Cucumaria
miniata
Cucumaria curata: See Pseudocnus
curatus
Cucumaria japonica: See Cucumaria
miniata
Cucumaria lubrica: See also Pseudocnus
curatus
Cucumaria
miniata
Cucumaria
pallida
Cucumaria
piperata
Cultellidae
(Family)--Key
Cup-and-saucer snail: See Calyptraea
fastigiata
Curly terebellid: See Thelepus
crispus
Cut-tailed isopod: See Idotea
resecata
Cyanea
capillata
Cyclostomata
(Order of Bryozoans)--Key
Cydonium muelleri: See Geodia
mesotriaena
Cynthia gibbsii: See Styela
gibbsii
D
Dahlia anemone: See Urticina
crassicornis
Daisy brittle star: See Ophiopholus
aculeata
Dana's blade shrimp: See Spirontocaris
lamellicornis
Dana's bladed shrimp: See Spirontocaris
lamellicornis
Dark mahogany clam: See Nuttallia
obscurata
Dawson's sun star: See Solaster
dawsoni
Decorator crab: See Oregonia
gracilis,
Chorilia
longipes
Deep sea prawn: See Pandalus
eous
Delicate six-rayed star: See Leptasterias
aequalis
Dendraster
excentricus
Dendronotacea
(Suborder) Key
Dendrobranchiata
(Suborder)--Key
Dendrochiton
flectens
Dendronotus
diversicolor
Dendronotus giganteus: See Dendronotus
iris
Dendronotus
iris
Dermasterias
imbricata
Dialula
sandiegensis
Diamphiodia urtica: See Amphiodia
urtica
Diodora
aspera
Dirona
albolineata
Dirona
aurantia
Discodoris
heathi
Discodoris sandiegensis See Dialula
sandiegensis
Discorsopagurus
schmitti
Disporella
separata
Distaplia
occidentalis
Distaplia
smithi
Discurria
insessa
Dock shrimp: See Pandalus
danae
Doridacea
(Suborder)--Key
Doris
odhneri
Dosidicus eschrichti: See Dosidicus
gigas
Dosidicus
gigas
Dosidicus steenstrupi: See Dosidicus
gigas
Dove shells: See Family
Columbellidae Key
Dunce cap limpet: See Acmaea
mitra
Dungeness crab: See Metacarcinus
magister
Dwarf mottled henricia: See Henricia
pumila
E
Eastern softshell clam: See Mya
arenaria
Eccentric sand dollar: See Dendraster
excentricus
Echinoidea
(Class)--Key
Echiura
(Phylum)--Key
Echiurus
echiurus subspecies
alaskanus
Edible mussel: See Mytilus
trossulus
Eelgrass isopod: See Idotea
resecata
Elassochirus
tenuimanus
Elongate lamellaria: See Velutina
prolongata
Elysia bedeckta: See Elysia
hedgpethi
Elysia
hedgpethi
Emarginate dogwinkle: See Nucella
ostrina
Emarginate whelk: See Nucella
ostrina
Encrusting bryozoan: See Membranipora
membranacea
Enteroctopus
dofleini
Enteropneusta
(Class)--Key
Entodesma
navicula
Entodesma saxicola: SeeEntodesma
navicula
Entoprocta
(Phylum)--Key
Epiactis
fernaldi
Epiactis
lisbethae
Epiactis
prolifera
Epiactis
ritteri
Epicaridea
(Suborder)--Key
Epitoniidae
(Family)--Key
Epitonium indianorum tincta: see Epitonium
tinctum
Epitonium subcornata: see Epitonium
tinctum
Epitonium
tinctum
Epizoanthus
scotinus
Eschricht's bittium: See Bittium
eschrichtii
Euclymene
zonalis
Eucopella everta: See Orthopyxis
everta
Eudistylia
vancouveri
Eunice
valens
Eunicidae
(Family)--Key
Eupagurus armatus: See Pagurus
armatus
Eupagurus dalli: See Pagurus
dalli
Eupagurus granosimanus: See Pagurus
granosimanus
Eupagurus hirsutiusculus: SeePagurus
hirsutiusculus
Eupagurus mertensi: See Pagurus
hirsutiusculus
Eupagurus ochotensis (part): See Pagurus
armatus
Eupentacta
quinquesemita
Euplokamis cucumis: See Hormiphora
cucumis
Eusergestes
similis
Euspira
lewisii
Evasterias
troschelii
Excirolana
kincaidi
F
Fabia
subquadrata
False cerith: See Batillaria
attramentaria
False Pacific jingle shell: See Pododesmus
macroschisma
Fat gaper clam: See Tresus
capax
Fat inkeeper worm: See Urechis
caupo
Feather duster worm: See Eudistylia
vancouveri
Feather star: See Florometra
serratissima
Fenestrate limpet: See Tectura
fenestrata
Fernald brooding anemone: See Epiactis
fernaldi, Cribrinopsis
fernaldi
Fewspine spinytail: See Systellaspis
debilis
Fifteen-scaled worm: See Harmothoe
imbricata
Finmark's tunicate: See Cnemidocarpa
finmarkiensis
Fish-eating
anemone: See Urticina
piscivora
Fissurellidae
(Family)--Key
Fissurellidea
bimaculata
Flabellifera
(Suborder)--Key
Flat Hoofsnail: See Hipponix
cranioides
Flat porcelain crab: See Petrolisthes
cinctipes
Flat spined triangle crab: See Phyllolithodes
papillosus
Flat-tipped piddock: See Penitella
penita
Flat-top piddock: See Penitella
penita
Flat topped sea squirt: See Chelysoma
productum
Flexed pandalid: See Pandalus
goniurus
Florometra perplexa: See Florometra
serratissima
Florometra
serratissima
Flustrellidra
corniculata
Fluted bryozoan: See Hippodiplosia
insculpta
Fluted coral bryozoan: See Hippodiplosia
insculpta
Foliate hornmouth: See Ceratostoma
foliatum
Foliated thorn purpura: See Ceratostoma
foliatum
Foolish mussel: See Mytilus
trossulus
Fragile scaleworm: See Arctonoe
fragilis
Fragile star: See Orthasterias
koehleri
Freeliving scaleworm: See Harmothoe
imbricata
Frilled scaleworm: See Arctonoe
fragilis
Frosted nudibranch: SeeDirona
albolineata
Fusitron
oregonensis
Fuzzy crab: See Hapalogaster
mertensii
G
Galatheidae
(Family)--Key
Gammaridea
(Suborder)--Key
Gaper clam: See Tresus
capax
Gastropoda
(with shell)--Key
Geodia agassizi: See Geodia
mesotriaena
Geodia breviana: See Geodia
mesotriaena
Geodia
mesotriaena
Geoduck clam: See Panopea
abrupta
Ghost shrimp: See Neotrypaea
californiensis
Giant acorn barnacle: See Balanus
nubilus
Giant barnacle: See Balanus
nubilus
Giant brooding anemone: See Epiactis
fernaldi
Giant dendronotid: See Dendronotus
iris
Giant Pacific coast bittium: See Bittium
eschrichtii
Giant freckled dorid: See Peltodoris
lentiginosa
Giant Pacific octopus: See Enteroctopus
dofleini
Giant Pacific oyster: See Crassostrea
gigas
Giant pile worm: See Nereis
brandti
Giant pod: See Siliqua
patula
Giant rock scallop: See Crassodoma
gigantea
Giant sea cucumber: See Parastichopus
californicus
Giant western nassa: See Nassarius
fossatus
Glebocarcinus
oregonensis
Gnathophausia bengalensis: See Neognathophausia
ingens
Gnathophausia bidentata: See Gnathophausia
gracilis
Gnathophausia brevispina: See Gnathophausia
gracilis
Gnathophausia calcarata: See Neognathophausia
ingens
Gnathophausia
childressi
Gnathophausia dentata: See Gnathophausia
gracilis
Gnathophausia doryphora: See Neognathophausia
ingens
Gnathophausia drepanephora: See Neognathophausia
gigas
Gnathophausia gigas: See Neognathophausia
gigas
Gnathophausia
gracilis
Gnathophausia ingens: See Neognathophausia
ingens
Gnathophausia
longispina
Gnathophausiidae
(Family)--Key
Gold dirona: See Dirona
aurantia
Golfingia
vulgaris
Golfingia
pugettensis
Gonionemus
vertens
Gorgonocephalus
eucnemis
Graceful crab: See Metacarcinus
gracilis
Graceful kelp crab: See Pugettia
gracilis
Graceful rock crab: See Pugettia
gracilis, Metacarcinus
gracilis
Granular hermit crab: See Pagurus
granosimanus
Grainyhand hermit crab: See Pagurus
granosimanus
Granular claw crab: See Oedignathus
inermis
Grapsidae
(Family)--Key
Gray brittle star (may not be a good name): See Ophiura
luetkenii
Gray shrimp: See Neocrangon
communis
Gray whelk: See Colus
griseus
Green false-jingle: See Pododesmus
macroschisma
Green grapes: See Perophora
annectens
Green aggregating anemone: See Anthopleura
elegantissima
Green surf anemone: See Anthopleura
xanthogrammica
Greenmark hermit: See Pagurus
caurinus
Gritty dorid: See Discodoris
heathi
Grooveback shrimp: See Parapasiphae
sulcatifrons
Grooved mussel crab: See Fabia
subquadrata
Gutless awning-clam: See Solemya
reidi
H
Hairy chiton: See Mopalia
ciliata
Hairy sea squirt: See Boltenia
villosa
Hairy triton: See Fusitron
oregonensis
Hairy cancer crab: See Glebocarcinus
oregonensis
Hairy crab: See Hapalogaster
mertensii
Hairy gilled worm: See Thelepus
crispus
Hairy hermit crab: See Pagurus
hirsutiusculus
Hairy lithodid: See Hapalogaster
mertensii
Hairy snail: See Trichotropis
cancellata
Halacaridae
(Famly)--Key
Haliclystus auricula: See Haliclystus
sp.
Haliclystus octoradiatus: See Haliclystus
salpinx, Haliclystus
sp.
Haliclystus
salpinx
Haliclystus sanjuanensis: See Haliclystus
sp.
Haliclystus stejnegeri: See Haliclystus
sp.
Haliclona
ecbasis
Haliotidae
(Family)--Key
Haliotis
kamtschatkana
Haliotis
rufescens
Halistaura cellularia: See Mitrocoma
cellularia
Halocynthia hilgendorfi: See Halocynthia
igaboja
Halocynthia hilgendorfi igaboja: See Halocynthia
igaboja
Halocynthia hispida: See Halocynthia
igaboja
Halocynthia
igaboja
Halocynthia okai: See Halocynthia
igaboja
Haminoea
vesicula
Hapalogaster brandti: See Oedignathus
inermis
Hapalogaster inermis: See Oedignathus
inermis
Hapalogaster
mertensii
Hardshell clam: See Leucoma
staminea
Harmothoe
imbricata
Heart cockle: See Clinocardium
nuttallii
Heart crab: See Phyllolithodes
papillosus
Heart lithodid: See Phyllolithodes
papillosus
Heart rock dweller: See Petricola
carditoides
Hearty petricolid: See Petricola
carditoides
Hedgehog hydroid: See Hydractinia
milleri
Hedgpeth's sea hare: See Elysia
hedgpethi
Heliometra serratissima: See Florometra
serratissima
Helmet crab: See Telmessus
cheiragonus
Helmet puncturella: See Cranopsis
cucullata
Hemichordata
(Phylum)--Key
Hemigrapsus
nudus
Hemigrapsus
oregonensis
Henricia
leviuscula
Henricia
pumila
Heptacarpus
brevirostris
Hermissenda
crassicornis
Hermit crabs: See Infraorder Anomura,
(mainly Family Paguridae)
Heteropora magna: See Heteropora
pacifica
Heteropora
pacifica
Hexacorallia
(Zoantharia) (Subclass)--Key
Hiatellidae
(Family)--Key
Hinds' chiton: See Mopalia
hindsii
Hinnites giganteus: See Crassodoma
gigantea
Hinnites multirugosus: See Crassodoma
gigantea
Hippodiplosia
insculpta
Hippolyte lamellicornis: See Spirontocaris
lamellicornis
Hippolytidae
(Family)--Key
Hipponicidae: See Hipponix
cranioides
Hipponix antiquatus: SeeHipponix
cranioides
Hipponix
cranioides
Holothuria californica: See Parastichopus
californicus
Holothuroidea
(Class)--Key
Hood puncturella: See Cranopsis
cucullata
Hooded puncturella: See Cranopsis
cucullata
Hoofshell: See Hipponix
cranioides
Hoof snail: See Hipponix
cranioides
Hopkins rose nudibranch: See Hopkinsia
rosacea
Hopkinsia
rosacea
Hormiphora
cucumis
Horn shells: See Family
Cerithidiidae
Horse barnacle: See Balanus
nubilus, Semibalanus
cariosus
Horse clam: See Tresus
capax
Horse crab: See Telmessus
cheiragonus
Horse mussel: See Modiolus
(Modiolus) modiolus
Horse's hoofsnail: See Hipponix
cranioides
Horseshoe ascidian: See Chelysoma
productum
Humboldt squid: See Dosidicus
gigas
Humilaria kennerleyi: See Humilaria
kennerlyi
Humilaria
kennerlyi
Humpy shrimp: See Pandalus
goniurus
Hyale frequens: See Protohyale
sp.
Hyale rubra frequens: See Protohyale
sp.
Hyas
lyratus
Hydractinia
laevispina
Hydractinia
milleri
Hydroida
(Order)--Key to medusae
Hydroida
(Order)--Key to polyps
Hydroids: See Order Hydroida
Hymenodora
frontalis
Hymenodora
gracilis
I
Idotea
fewkesi
Idotea
ochotensis
Idotea resecata: See Pentidotea
resecata
Idotea
wosnessenskii
Idothea resecata: See Idotea
resecata
Idothea wosnessenskii: See Idotea
wosnessenskii
Inflated limpet: See Tectura
persona
Inkeeper worm: See Urechis
caupo
Iridescent tubeworm: See Eunice
valens
Ischnochiton mertensii: See Lepidozona
mertensii
Isopoda
(Order)--Key
J
Janira cucumis: See Hormiphora
cucumis
Japanese abalone: See Haliotis
kamtschatkana
Japanese false cerith: See Batillaria
attramentaria
Japanese littleneck clam: See Venerupis
philippinarum
Japanese oyster: See Crassostrea
gigas
Jellyfish: See Class Scyphozoa
or Order Hydroida
Jingle shell: See Pododesmus
macroschisma
Jumbo squid: See Dosidicus
gigas
K
Kaburakia
excelsa
Kamchatka abalone: See Haliotis
kamtschatkana
Katharina
tunicata
Kelp amphipod: See Peramphithoe
humeralis
Kelp crab: See Pugettia
gracilis, Pugettia
producta
Kelp encrusting bryozoan: See Membranipora
membranacea
Kelp isopod: See Idotea
resecata
Kelp lace bryozoan: See Membranipora
membranacea
Kelletia dira See Searlesia
dira
Kennerly's venus: See Humilaria
kennerlyi
Keyhole limpet: See Diodora
aspera
King clam: See Panopea
abrupta
Krygier's spinytail: See Systellaspis
cristata
L
Labidochirus
splendescens
Lacuna
variegata
Lacuninae
(Subfamily)--Key
Lacy crust bryozoan: See Membranipora
membranacea
Laila
cockerelli
Lampshells: See Phylum
Brachiopoda
Laonome
kroeyeri
Laqueus
californianus
Large pea crab: See Pinnixa
faba
Large squid: See Dosidicus
gigas
Leafy thorn purpura: See Ceratostoma
foliatum
Leather limpet: See Onchidella
borealis
Leather star: See Dermasterias
imbricata
Leathery anemone: See Urticina
coriacea
Lebbeus
grandimanus
Lebbeus
groenlandicus
Lepadomorpha
(Suborder)--Key
Lepas
anatifera
Lepidonotus caelorus: See Lepidonotus
squamatus
Lepidonotus
squamatus
Lepidozona
mertensii
Lepidozona
retiporosa
Leptasterias
aequalis
Leptasterias
hexactis
Leukoma
staminea
Lewis' moon snail: See Euspira
lewisii
Lichenopora
novae-zelandiae
Lichenopora
verrucaria
Lightbulb ascidian: See Clavelina
huntsmani
Lightbulb tunicate: See Clavelina
huntsmani
Ligia
occidentalis
Ligia
pallasii
Lineus striatus: See Micrura
verrilli
Lion nudibranch: See Melibe
leonina
Lion's mane jellyfish: See Cyanea
capillata
Lirabuccinium dirum See Searlesia
dira
Lisbeth's brooding anemone: See Epiactis
lisbethae
Lithodidae(Family)
--Key
Littleneck clam: See
Leukoma staminea
Littorinidae
(Family)--Key
Littorina
scutulata
Littorina sitchana: See Littorina
sitkana
Littorina
sitkana
Lobate ctenophore: See Bolinopsis
infundibulum
Lobed sea gooseberry: See Bolinopsis
infundibulum
Long armed brittle star: See Amphiodia
urtica
Long-armed sea star: See Orthasterias
koehleri
Longhorn decorator crab: See Chorilia
longipes
Long clam: See Mya
arenaria
Long-horned beach hopper: See Megalorchestia
californiana
Long-necked clam: See Mya
arenaria
Longrayed starfish: See Orthasterias
koehleri
Long-stalked sea squirt: See Styela
montereyensis
Lophogaster ingens: See Neognathophausia
ingens
Lophogastrida
(Order)--Key
Lophopanopeus
bellus subspecies bellus
Lopholithodes
foraminatus
Lopholithodes
mandtii
Lottia
asmi
Lottia
digitalis
Lottia fenestrata: See Tectura
fenestrata
Lottia
gigantea
Lottia
instabilis
Lottia
pelta
Lottiidae
(Family)--Key
Loxosomella
sp.
Loxothylacus
panopaei
Lugworms: See Family
Arenicolidae
Lugworm pea crab: See Pinnixa
eburna
Luidia
foliolata
Lunatia lewisii: See Euspira
lewisii
Lyonsia saxicola: see Entodesma
navicula
Lyonsiidae
(Family)--Key
Lyre crab: See Hyas
lyratus
M
Macoma kelseyi: See Macoma
nasuta
Macoma
nasuta
Macoma tersa: See Macoma
nasuta
Mactridae
(Family)--Key
Manila clam: See Venerupis
philippinarum
Majidae
(Family)--Key
Maldanidae
(Family)--Key
Maned nudibranch: See Aeolidia
papillosa
Mantle pea crab: See Pinnixa
faba
Many-ribbed hydromedusa: See Aequorea
victoria
Market crab: See Metacarcinus
magister
Mask limpet: See Tectura
persona
Masked limpet: See Tectura
persona
Mayerella
banksia
Mediaster
aequalis
Megalorchestia
californiana
Megatebennus bimaculatus: SeeFissurellidea
bimaculata
Melibe
leonina
Membranipora horrida: See Callopora
horrida
Membranipora
membranacea
Merten's chiton: See Lepidozona
mertensii
Metacarcinus
gracilis
Metacarcinus
magister
Metacrangon
munita
Metandrocarpa
taylori
Metridium
giganteum
Metridium
senile subsp. fimbriatum
Micrura
verrilli
Micrura
wilsoni
Miller hydractinia: See Hydractinia
milleri
Mites (marine): See Family
Halacaridae
Mitella polymerus: See Pollicipes
polymerus
Mitrocoma
cellularia
Modest tellina: See Tellina
modesta
Modiolus
(Modiolus) modiolus
Mollusca
(Phylum)--Key
Money shell: See Pododesmus
macroschisma or Saxidomus
gigantea
Montacutidae
(Family)--Key
Monterey stalked tunicate: See Styela
montereyensis
Moon jelly: See Aurelia
aurita
Moon snail: See Euspira
lewisii
Mopalia
ciliata
Mopalia
hindsii
Mopalia
lignosa
Mopalia
muscosa
Mopalia
spectabilis
Mopalia
swanii
Morning sun star: See Solaster
dawsoni
Mossy chiton: See Mopalia
muscosa
Mossy nudibranch: See Aeolidia
papillosa
Mottled anemone: See Urticina
crassicornis
Mottled Henricia: See Henricia
pumila
Mottled red chiton: See Lepidozona
mertensii
Mud clam: See Mya
arenaria
Mud nemertean: See Paranemertes
peregrini
Munida
quadrispina
Murex: See Family
Muricidae
Muricidae
(Family)--Key
Mushroom ascidian: See Distaplia
occidentalis
Mussel crab: See Fabia
subquadrata
Mussel worm: See Nereis
vexillosa
Mya
arenaria
Mycale
adhaerens
Myidae
(Family)--Key
Mysids--Key
Mytilidae
(Family)--Key
Mytilimeria
nuttalli
Mytilus
californianus
Mytilus edulis: See Mytilus
trossulus
Mytilus
trossulus
Myxilla
incrustans
N
Nanaimo dorid: See Acanthodoris
nanaimoensis
Nanny nose: See Mya
arenaria
Nassa fossatus: See Nassarius
fossatus
Nassariidae
(Family)--Key
Nassarius
fossatus
Natantia
(shrimp)--Key
Naticidae
(Family)--Key
Neaeromyra rugifera: See Pseudopythina
rugifera
Nemertea
(Phylum)--Key
Neocrangon
communis
Neognathophausia
gigas
Neognathophausia
ingens
Neoturris
brevicornis
Neotrypaea
californiensis
Nephtyidae
(Family)--Key
Nephtys
ferruginea
Neptuneidae
(Family)--Key
Nereidae
(Family)--Key
Nereis
vexillosa
Nereis
brandti
Nestling clam: See Petricola
carditoides
Nitidiscala eelense: See Epitonium
tinctum
Nitidiscala tincta: See Epitonium
tinctum
Nodding heads: See Barentsia
robusta
North Pacific giant octopus: See Enteroctopus
dofleini
Northern abalone: See Haliotis
kamtschatkana
Northern bay mussel: See Mytilus
trossulus
Northern feather duster worm: See Eudistylia
vancouveri
Northern hooded shrimp: See Betaeus
harrimani
Northern kelp crab: See Pugettia
producta
Northern razor clam: See Siliqua
patula
Northern red anemone: See Urticina
crassicornis
Northern shrimp: See Pandalus
eous
Northern staghorn bryozoan: See Heteropora
pacifica
Northern striped dogwinkle: See Nucella
ostrina
Northwest Onchidella: See Onchidella
borealis
Northwest Ugly clam: see Entodesma
navicula
Notoacmea fenestrata: See Tectura
fenestrata
Notoacmea insessa: See Discurria
insessa
Notoacmea persona: See Tectura
persona
Notoacmea scutum: See Tectura
scutum
Notaspidea (Order)--Species Berthella
californica
Nucella
canaliculata
Nucella emarginata: See Nucella
ostrina
Nucella
lamellosa
Nucella
ostrina
Nucellidae
(Family)--Key
Nuculida
(Order)--Key
Nudibranchia
(Order)--Key
Nuttallia
obscurata
O
Obelia
dichotoma
Ocean sergestid: See Sergia
tenuiremis
Ocenebra
lurida
Ochre sea star: See Pisaster
ochraceous
Octocorallia(Subclass)--Key. See Subclass
Alcyonaria
Octopus and squid: See Class Cephalopoda
Octopus apollyon: See Enteroctopus
dofleini
Octopus dofleini: See Enteroctopus
dofleini
Octopus hongkongensis: See Enteroctopus
dofleini
Octopus punctatus: See Enteroctopus
dofleini
Octopus
rubescens
Oedignathus gilli: See Oedignathus
inermis
Oedignathus
inermis
Olive-green isopod: See Idotea
wosnessenskii
Olivella
biplicata
Olividae
(Family)--Key
Ommastrephes giganteus: See Dosidicus
gigas
Onchidella
borealis
Oniscoidea
(Suborder)--Key
Opalescent nudibranch: See Hermissenda
crassicornis
Opalia
montereyensis
Ophiodromus
pugettensis
Ophiopholus
aculeata
Ophiopteris
papillosa
Ophiura
luetkenii
Ophiuroidea
(Class)--Key
Oplophoridae
(Family)--Key
Oplophorus
spinosus
Opisthobranchia
(Subclass)--Key
Orange anemone: See Stomphia
didemon
Orange colonial sea squirt: See Distaplia
occidentalis
Orange peel nudibranch: See Tochuina
tetraquetra
Orange sea cucumber: See Cucumaria
miniata
Orchestoidea californiana: See Megalorchestia
californiana
Oregon queen crab: See Lopholithodes
foraminatus
Oregon rock crab: See Glebocarcinus
oregonensis
Orange sea squirt: See Cnemidocarpa
finmarkiensis
Orange social ascidian: See Metandrocarpa
taylori
Orange social sea squirt: See Metandrocarpa
taylori
Orange-striped jellyfish: See Gonionemus
vertens
Oregonia
gracilis
Orobitella rugifera: see Pseudopythina
rugifera
Orthasterias columbiana: See Orthasterias
koehleri
Orthasterias
koehleri
Orthopyxis
everta
Ostreidae
(Family)--Key
Ostrich plume hydroid: See Aglaophenia
sp.
Otter clam: See Tresus
capax
Oval yoldia: See Yoldia
myalis
P
Pachycerianthus
fimbriatus
Pachycheles
rudis
Pachygrapsus
crassipes
Pacific blue mussel: See Mytilus
trossulus
Pacific branching bryozoan: See Bugula
californica
Pacific chinese hat snail: See Calyptraea
fastigiata
Pacific geoduck clam: See Panopea
abrupta
Pacific giant octopus: See Enteroctopus
dofleini
Pacific lugworm: See Abarenicola
pacifica
Pacific lyre crab: See Hyas
lyratus
Pacific neapolitan lugworm: See Abarenicola
pacifica
Pacific oyster: see Crassostrea
gigas
Pacific plate limpet: See Tectura
scutum
Pacific razor clam: See Siliqua
patula
Pacific rock crab: See Cancer
antennarius
Pacific rough piddock: See Zirfaea
pilsbryi
Pacific sand dollar: See Dendraster
excentricus
Paddle ascidian: See Distaplia
smithi
Paguridae
(Family)--Key
Pagurus
armatus
Pagurus
beringanus
Pagurus
caurinus
Pagurus
dalli
Pagurus
granosimanus
Pagurus
hirsutiusculus
Pagurus (Trigonocheirus) hirsutiusculus:
See Pagurus
hirsutiusculus
Pagurus
kennerlyi
Pagurus (Eupagurus) mertensi: See Pagurus
hirsutiusculus
Pagurus ochotensis (part): See Pagurus
armatus
Pagurus
quaylei
Pagurus
samuelis
Pagurus
stevensae
Painted anemone: See Urticina
crassicornis
Painted brittle star: See Ophiopholus
aculeata
Painted star: See Orthasterias
koehleri
Painted Tealia: See Urticina
crassicornis
Painted Urticina: See Urticina
crassicornis
Painted wentletrap: See Epitonium
tinctum
Pale creeping pedal sea cucumber: See Psolidiuim
bidiscum
Pandalidae
(Family)--Key
Pandalopsis
dispar
Pandalus borealis: See Pandalus
eous
Pandalus borealis eous: See Pandalus
eous
Pandalus
danae
Pandalus dapifer: See Pandalus
goniurus
Pandalus
eous
Pandalus
goniurus
Pandalus montagui tridens: See Pandalus
tridens
Pandalus
platyceros
Pandalus
stenolepis
Pandalus
tridens
Panopa abrupta: See Panopea
abrupta
Panopa generosa: See Panopea
abrupta
Panopea
abrupta
Panopea generosa: See Panopea
abrupta
Paphia staminea: See Leukoma
staminea
Papillid crab: See Phyllolithodes
papillosus
Papillose aeolid: See Aeolidia
papillosa
Paracrangon
echinata
Paranemertes
peregrina
Parapholas
californica
Parasitic pea crab: See Fabia
subquadrata
Parastichopus
californicus
Parchment tube worm: See Eudistylia
vancouveri
Paroctopus sp: See Enteroctopus
dofleini
Parapasiphae
sulcatifrons
Pasiphaeidae
(Family)--Key
Patellogastropoda
(Order)--Key
Patiria
miniata
Paxillose crab: See Oedignathus
inermis
Pea crab: See Pinnixa
faba, Fabia
subquadrata
Peanut sea squirt: See Styela
gibbsii
Peanut worm: See Phylum
Sipuncula
Pea-pod borer: See Adula
californiensis
Pearly monia: See Pododesmus
macroschisma
Pectinidae
(Family)--Key
Peltodoris
lentiginosa
Penaeidae
(Family)--Key
Penitella
penita
Penitella
turnerae
Pennatulacea
(Order)--Key
Pentacta piperata: See Cucumaria
piperata
Pentidotea
resecata
Pentidotea wosnessenskii: See Idotea
wosnessenskii
Peppered sea cucumber: See Cucumaria
piperata
Peramphithoe
humeralis
Perophora
annectens
Petaloceras berianus: See Phyllolithodes
papillosus
Petricola
carditoides
Petricolidae(Family)--Key
Petrolisthes
cinctipes
Petrolisthes
eriomerus
Phacellophora
camtschatica
Phascolosoma
agassizii
Phidiana crassicornis: See Hermissenda
crassicornis
Pholadidae
(Family)--Key
Phoxichilidium
femoratum
Phyllodocidae
(Family)--Key
Phyllolithodes bicornis: See Phyllolithodes
papillosus
Phyllolithodes
papillosus
Piddock clams: See Family Pholadidae
Pile worm: See Nereis
brandti, Nereis
vexillosa
Pilsbry piddock: See Zirfaea
pilsbryi
Pink mud shrimp: See Neotrypaea
californiensis
Pink shrimp: See Pandalus
eous
Pinnixa
eburna
Pinnixa
faba
Pinnixa
tubicola
Pinnothera faba: See Pinnixa
faba
Pinnotheres concharum: See Fabia
subquadrata
Pinnotheres faba: See Pinnixa
faba
Pinnotheridae(Family)--Key
Pinto abalone: See Haliotis
kamtschatkana
Pisaster
brevispinus
Pisaster
ochraceus
Placetron
wosnessenskii
Placiphorella
velata
Plate limpet: See Tectura
scutum
Platyhelminthes(Phylum)
Class Turbellaria--Key
Pleurobrachia
bachei
Pleurophyllidia californica: SeeArmina
californica
Plicifusus griseus: See Colus
griseus
Plume worm: See Eudistylia
vancouveri, Serpula
vermicularis
Podarke pugettensis: See Ophiodromus
pugettensis
Pododesmus cepio: See Pododesmus
macroschisma
Pododesmus
macroschisma
Polinices lewisii: See Euspira
lewisii
Pollicipes
polymerus
Polychaeta
(Class)--Key
Polycarpa finmarkiensis: See Cnemidocarpa
finmarkiensis
Polychaete worm pea crab: See Pinnixa
tubicola
Polycladida
(Order)--Key
Polynoe fragilis: See Arctonoe
fragilis
Polynoidae
(Family)--Key
Polyorchis
penicillatus
Polyplacophora
(Class)--Key
Polypus apollyon: See Enteroctopus
dofleini
Polypus hongkongensis: See Enteroctopus
dofleini
Porcellanidae
(Family)--Key
Porifera
(Phylum)--Key
Praxilla zonalis: See Euclymene
zonalis
Propeamussidae
(Family)--Key
Prosobranchia
(Subclass)--Key
Protohyale
sp.
Protothaca semidecussata: See Venerupis
philippinarum
Protothaca staminea: See Leukoma
staminea
Pseudochama
exogyra
Pseudocnus
curatus
Pseudocnus lubricus: See also Pseudocnus
curatus
Pseudopythina
rugifera
Psolidium
bidiscum
Psolidium bullatum: SeePsolidium
bidiscum
Psolus californicus: See Psolus
chitonoides
Psolus
chitonoides
Pteraster
tesselatus
Pterorytis foliatus: See Ceratostoma
foliatum
Ptilosarcus
gurneyi
Puget Sound box crab: See Lopholithodes
foraminatus
Pugettia
gracilis
Pugettia lordii: See Pugettia
gracilis
Pugettia
producta
Pugettia quadridens var gracilis: See Pugettia
gracilis
Puncturella cucullata: See Cranopsis
cucullata
Puncturella
galeata
Purple encrusting bryozoan: See Disporella
separata
Purple-hinged rock scallop: See Crassodoma
gigantea
Purple magogany clam: See Nuttallia
obscurata
Purple ribbon worm: See Paranemertes
peregrini
Purple sea star: See Pisaster
ochraceous
Purpurata foliata: See Ceratostoma
foliatum
Pycnogonid: See Tanystylum
occidentalis, Pycnogonum
stearnsi
Pycnogonida(Class)--Key
Pycnogonum
stearnsi
Pycnopodia
helianthoides
Pygmy rock crab: See Glebocarcinus
oregonensis
Pyrenidae (Family): See Family
Columbellidae
Pyura
haustor
Pyura okai: See Halocynthia
igaboja
Q
Quayle's hermit crab: See Pagurus
quaylei
R
Rainbow star: See Orthasterias
koehleri
Raphnotus subquadrata: See Fabia
subquadrata
Razor clam: See Siliqua
patula
Red abalone Haliotis
rufescens
Red and green anemone: See Urticina
crassicornis
Red ascidian: See Aplidium
solidum
Red banded commensal scale worm: See Arctonoe
vittata
Red banded seastar: See Orthasterias
koehleri
Red bead anemone: See Urticina
coriacea
Red-brown bristly crab: See Hapalogaster
mertensii
Red cancer crab: See Cancer
productus
Red chiton: See Tonicella
insignis; Lepidozona
mertensii
Red commensal scaleworm: See Arctonoe
pulchra
Red-eye jellyfish: See Polyorchis
penicillatus
Red-flecked Mopalia: See Mopalia
spectabilis
Red ghost shrimp: See Neotrypaea
californiensis
Red gilled dorid: See Acanthodoris
nanaimoensis
Red rock crab: See Cancer
productus, Romaleon
antennarius
Red sea buttons: See Metandrocarpa
taylori
Red sea cucumber: See Cucumaria
miniata
Red sea gherkin: See Cucumaria
miniata
Red sea squirt: See Cnemidocarpa
finmarkiensis
Red nudibranch: See Rostanga
pulchra
Red sponge doris: See Rostanga
pulchra
Red sponge nudibranch: See Rostanga
pulchra
Restless ribbon worm: See Paranemertes
peregrina
Rhinolithodes
wosnessenskii
Rhizocephalan
barnacles--Key
Rhizocephalan
parasitic barnacle Loxothylacus panopaei
Rhizocephalan
parasitic barnacle Sylon hippolytes
Ribbed carpet shell: See Leukoma
staminea
Ribbed clam: See Humilaria
kennerlyi
Ribbed dogwinkle: See Nucella
ostrina
Ribbed rock whelk: See Nucella
ostrina
Ring-spotted dorid: See Dialula
sandiegensis
Rock barnacle: See Semibalanus
cariosus
Rock clam: See Penitella
penita, Leukoma
staminea
Rock cockle: See Leukoma
staminea
Rock crab: See Romaleon
antennarius
Rock dweller: See Petricola
carditoides
Rock-dwelling clam: See Entodesma
navicula,
Petricola
carditoides
Rock Entodesma: See Entodesma
navicula
Rock louse: See Ligia
pallasii, Ligia
occidentalis
Rock oyster: See Pododesmus
macroschisma
Rock scallop: See Crassodoma
gigantea
Rock thais: See Nucella
ostrina
Rock whelk: See Nucella
ostrina
Rocking chair limpet: See Lottia
instabilis
Rockweed isopod: See Idotea
wosnessenskii
Romaleon
antennarium
Rough keyhole limpet: See Diodora
aspera
Rough patch shrimp: See Pandalus
stenolepis
Rough piddock: See Zirfaea
pilsbryi
Rossia
pacifica
Rostanga
pulchra
Ruditapes philippinarum: See Venerupis
philippinarum
Ruffled scaleworm: See Arctonoe
fragilis
Rufous-tipped nudibranch: See Acanthodoris
nanaimoensis
Rusty scaleworm: See Lepidonotus
squamatus
S
Sabellidae
(Family)--Key
Saccoglossus
bromophenolosus
Sacculinid
Rhizocephalan parasitic barnacle Loxothylacus panopaei
Sacoglossa
(Order)--Key
San Diego Dorid: See Dialula
sandiegensis
Sand anemone: See Urticina
columbiana
Sand beach isopod: See Excirolana
kincaidi
Sandy beach isopod: See Excirolana
kincaidi
Sand dollar: See Dendraster
excentricus
Sand gaper: See Mya
arenaria
Sand rose anemone: See Urticina
columbiana
Sandworm: See Nephtys
ferruginea, Nereis
vexillosa
Saxidomus
gigantea
Saxidomus giganteus: See Saxidomus
gigantea
Scale-sided piddock: See Parapholas
californica
Scaleworm: See Arctonoe
fragilis,
Arctonoe
pulchra,Arctonoe
vittata
Scapellomorpha
(Suborder)--Key
Scarlet anemone: See Urticina
coriacea
Schizoporella insculpta: See Hippodiplosia
insculpta
Schizothaerus capax: See Tresus
capax
Scleractinia
(Order)--Key
Sclerocrangon communis: See Neocrangon
communis
Scleroplax
granulata
Screw snail: See Bittium
eschrichtii, Batillaria
attramentaria
Sculptured bryozoan: See Hippodiplosia
insculpta
Scyra
acutifrons
Scyphozoa
(Class)--Key (Jellyfish)
Sea anenones: See Order Actiniaria
Sea bat: See Patiria
miniata
Sea blubber: See Cyanea
capillata
Sea bottle clam: See Mytilimeria
nuttalli
Sea clown nudibranch: See Triopha
catalinae
Sea cucumbers: See Class Holothuroidea
Sea flea: See Amphipod suborder Gammaridea
or Protohyale
sp. etc.
Sea gooseberry: See Pleurobrachia
bachei
Sea grapes: See Perophora
annectens
Sea mouse: See Aphrodita
japonica or another member of Family
Aphroditidae or the nudibranch Aeolidia
papillosa
Sea nettle: See Cyanea
capillata; Chrysaora
fuscescens
Sea peanut: See Styela
gibbsii
Sea plume: See Obelia
dichotoma
Sea pork: See Aplidium
solidum, Aplidium
californicum
Sea squirt: See Class
Ascidiacea
Sea stars: See Class Asteroidea
Sea urchins: See Class Echinoidea
Sea walnut: See Pleurobrachia
bachei
Searlesia
dira
Sea spider: See Class Pycnogonida
Seaweed isopod: See Idotea
resecata
Seaweed muffs: See Flustrellidra
corniculata
Semaeostomae
(Order)--Key
Semibalanus
cariosus
Sepia nigra: See Dosidicus
gigas
Sepia tunicata: See Dosidicus
gigas
Sergestes similis: See Euseregestes
similis
Sergestidae(Family)--Key
Sergia
tenuiremis
Serpula
vermicularis
Serpulidae
(Family)--Key
Shag-rug aeolis: See Aeolidia
papillosa
Shag rug nudibranch: See Aeolidia
papillosa
Shaggy mouse nudibranch: See Aeolidia
papillosa
Shellbinder worm: See Thelepus
crispus or Thelepus
setosus
Shield-backed kelp crab: See Pugettia
producta
Shiny orange sea squirt: See Cnemidocarpa
finmarkiensis
Shiny red tunicate: See Cnemidocarpa
finmarkiensis
Short-spined shrimp: See Heptacarpus
brevirostris
Short-spired purple: See Nucella
ostrina
Shrimp: See Natantia
for families of true shrimp and prawns, Thalassinidea
for mud and ghost shrimp
Shrimp parasitic isopod: See Bopyroides
hippolytes
Sidestriped shrimp: See Pandalopsis
dispar
Siliqua
patula
Sipuncula
(Phylum)--Key
Sitka littorinid: See Littorina
sitkana
Sitka periwinkle: See Littorina
sitkana
Six-rayed star: See Leptasterias
hexactis, Leptasterias
aequalis
Skeleton shrimp: See Mayerella
banksia, Tritella
pilimana, Caprella
angusta
Slender crab: See Metacarcinus
gracilis
Slender kelp crab: See Pugettia
gracilis
Slender-spined bryozoan: See Callopora
horrida
Slipper sea cucumber: See Psolus
chitonoides
Small brittle star: See Ophiura
luetkenii
Small northern abalone: See Haliotis
kamtschatkana
Smith's distaplia: See Distaplia
smithi
Smooth leather bryozoan: See Alcyonidium
pedunculatum
Smooth porcelain crab: See Petrolisthes
cinctipes
Smooth velvet snail: See Velutina
prolongata
Smooth Washington Clam: See Saxidomus
gigantea
Snakelock anemone: See Cribrinopsis
fernaldi
Snail fur: See Hydractinia
milleri, Hydractinia
laevispina
Snow crab: See Chionoecetes
bairdi
Snow white dorid: See Doris
odhneri
Soft bellied crab: See Oedignathus
inermis
Soft clam: See Mya
arenaria
Softshell clam: See Mya
arenaria
Solaster
dawsoni
Solaster
stimpsoni
Solemya
reidi
Southern tanner crab: See Chionoecetes
bairdi
Spaghetti worm: See Thelepus
crispus, Thelepus
japonicus, or Thelepus
setosus
Speckled limpet: See Tectura
persona
Spider crab: See Pugettia
gracilis, Pugettia
producta
Spiny headed tunicate: See Boltenia
villosa
Spiny lebbeid: See Lebbeus
groenlandicus
Spiny legged lithode crab: See Phyllolithodes
papillosus
Spiny thigh sea spider: See Phoxichilidium
femoratum
Spiral bryozoan: See Bugula
californica
Spirontocaris brevirostris: See Heptacarpus
brevirostris
Spirontocaris
lamellicornis
Spoonworm, Alaska. See Echiurus
echiurus subspecies alaskanus
Spot-bellied rock crab: See Romaleon
antennarius
Spot shrimp: See Pandalus
platyceros
Spotted swimming anemone: See Stomphia
coccinea
Squid and octopus: See Class Cephalopoda
Stalked hairy sea squirt: See Boltenia
villosa
Stalked tunicate: See Styela
montereyensis
Seastars: See Class Asteroidea
Stauromedusae
(Order)--Key
Steamer clam: See Mya
arenaria
Stearns' pycnogonid: See Pycnogonum
stearnsi
Stenoplax
heathiana
Stereoderma miniata: See Cucumaria
miniata
Stichopus californicus: See Parastichopus
californicus
Stiff-stalked bryozoan: See Bugula
californica
Stilomysis
grandis
Stomphia
coccinea
Stomphia
didemon
Stout coastal shrimp: See Heptacarpus
brevirostris
Stout crangon: See Crangon
alba
Stout shrimp: See Heptacarpus
brevirostris
Strawberry anemone: See Corynactis
californica or Urticina
lofotensis
Striped dogwinkle: See Nucella
ostrina
Strongylocentrotus
droebachiensis
Strongylocentrotus
franciscanus
Strongylocentrotus
pallidus
Strongylocentrotus
purpuratus
Stubby rose anemone: See Urticina
coriacea
Styela elsa: See Cnemidocarpa
finmarkiensis
Styela finmarkiensis: See Cnemidocarpa
finmarkiensis
Styela
gibbsii
Styela joannae: See Cnemidocarpa
finmarkiensis
Styela
montereyensis
Styela stimpsoni: See Cnemidocarpa
finmarkiensis
Stylissa
stipitata
Suberites
suberea
forma latus
Summer clam: See Tresus
capax
Sunburst anemone: See Anthopleura
sola
Swan's mopalia: See Mopalia
swanii
Swimming anemone: See Stomphia
didemon
Sylon
hippolytes
Symbiotic scaleworm: See Arctonoe
fragilis, Arctonoe
pulchra, Arctonoe
vittata
Syringella
amphispicula
Systellaspis
braueri
Systellaspis
cristata
Systellaspis
debilis
T
Talitridae
(Family): Beach Hoppers
Tall-spired snail: See Batillaria
attramentaria
Tanner crab: See Chionoecetes
bairdi
Tanystylum
occidentalis
Tapes japonica: See Venerupis
philippinarum
Tapes philippinarum: SeeVenerupis
philippinarum
Tapes semidecussata: See Venerupis
philippinarum
Taylor's colonial tunicate: See Metandrocarpa
taylori
Taylor's social tunicate: See Metandrocarpa
taylori
Tealia crassicornis: SeeUrticina
crassicornis
Tealia piscivora: See Urticina
piscivora
Tectura
fenestrata
Tectura
persona
Tectura
scutum
Tegella horrida: See Callopora
horrida
Tegula brunnea: See Chlorostoma
brunnea
Tegula
eiseni
Tegula funebralis: See Chlorostoma
funebralis
Tellina buttoni: See Tellina
modesta
Tellina
modesta
Tellinidae
(Family)--Key
Telmessus
cheiragonus
Terebellidae
(Family)--Key
Terebratalia
transversa
Tethyum finmarkiensis: See Cnemidocarpa
finmarkiensis
Tethyum igaboja: See Halocynthia
igaboja
Thais canaliculata: See Nucella
canaliculata
Thais emarginata: See Nucella
ostrina
Thais lamellosa: See Nucella
lamellosa
Thaumantias cellularia: See Mitrocoma
cellularia
Thalassinidea
(Infraorder)--Key
Thatched barnacle: See Semibalanus
cariosus
Thelepus
crispus
Thelepus
japonicus
Thelepus
setosus
Thick-petaled rose anemone: See Urticina
crassicornis
Thoridae (Family)--in this key, keys with Family
Hippolytidae
Threaded bittium: See Bittium
eschrichtii
Threaded horn shell: See Bittium
eschrichtii
Tinted wentletrap: See Epitonium
tinctum
Tochni: See Tochuina
tetraquetra
Tochuina
tetraquetra
Tomales bay cockle: See Leukoma
staminea
Tonicella
insignis
Tonicella
lineata
Tonicella undocaerulea: See Tonicella
lineata
Transparent isopod: See Idotea
resecata
Transparent sea squirt: See Corella
inflata
Transparent tunicate: See Corella
inflata
Tresus
capax
Trichotropidae (Family): See Family
Capulidae
Trichotropis
cancellata
Triopha carpenteri: See Triopha
catalinae
Triopha
catalinae
Tritella
pilimana
Trochidae(Family)--Key
Trumpet sponge: See Stylissa
stipitata
Tubedwelling anemone: See Pachycerianthus
fimbriatus
Tube-dwelling pea crab: See Pinnixa
tubicola
Tubeworm hermit: See Discorsopagurus
schmitti
Tubulanus
polymorphus
Tunicates: See Class
Ascidiacea
Turbellaria
(Class)--Key
Twospine crangon: See Neocrangon
communis
Two-spot keyhole limpet: See Fissurellidea
bimaculata
U
Ubiquitous brittle star: See Ophiopholus
aculeata
Ugly clam: see Entodesma
navicula
Unstable limpet: See Lottia
instabilis
Unstable seaweed limpet: See Lottia
instabilis
Upogebia
pugettensis
Urchins: See Class Echinoidea
Urechis caupo
Urticina
columbiana
Urticina
coriacea
Urticina
crassicornis
Urticina
lofotensis
Urticina
piscivora
V
Valvifera
(Suborder)--Key
Variable lacuna: See Lacuna
variegata
Variegate lacuna: See Lacuna
variegata
Variegated chink shell: See Lacuna
variegata
Variegated limpet: See Tectura
persona
Varnish clam: See Nuttallia
obscurata
Veiled chiton: See Placiphorella
velata
Velella
velella
Velutina
prolongata
Velutinidae
(Family)--Key
Veneridae
(Family)--Key
Venerupis
philippinarum
Venerupis staminea: See Leukoma
staminea
Vermilion sea cucumber: See Cucumaria
miniata
Verrill's ribbon worm: See Micrura
verrilli
Volcano limpet: See Diodora
aspera
Vosnesenski's isopod: See Idotea
wosnessenskii
W
Wandering ribbon worm: See Paranemertes
peregrini
Warty tunicate: See Pyura
haustor
Washington Clam: See Saxidomus
gigantea
Water jellyfish: See Aequorea
victoria
Webbed star: See Patiria
miniata
Wentletrap: See Family
Epitoniidae
Western banded tegula: See Tegula
eiseni
Western white slipper snail (shell): See Crepidula
perforans
White-banded bobbit worm: See Eunice
valens
White berthella: See Berthella
californica
White bubble snail: See Haminoea
vesicula
White buckshot barnacle: See Balanus
glandula
White cap limpet: See Acmaea
mitra
White knee hermit: See Pagurus
dalli
White knight dorid: See Doris
odhneri
White knight nudibranch: See Doris
odhneri
White-lined chiton: See Tonicella
insignis
White-lined Dirona: SeeDirona
albolineata
White night doris: See Doris
odhneri
White sea cucumber: See Eupentacta
quinquesemita
White-spotted anemone: See Urticina
lofotensis
White-spotted rose anemone: See Urticina
lofotensis
White wentletrap: See Epitonium
tinctum
Widehand hermit crab: See Elassochirus
tenuimanus
Wine-plumed dorid: See Acanthodoris
nanaimoensis
Wine-plumed spiny doris: See Acanthodoris
nanaimoensis
Wrinkled amphissa: See Amphissa
columbiana
Wrinkled dove shell: See Amphissa
columbiana
Wrinkled clam: see Entodesma
navicula
Wrinkled purple: See Nucella
lamellosa
Wrinkled seapump: See Pyura
haustor
Wrinkled sea squirt: See Pyura
haustor
X
Xanthidae
(Family)--Key
Y
Yellow-green creeping tunicate: See Perophora
annectens
Yellowleg pandalid: See Pandalus
tridens
Yellow social tunicate: See Perophora
annectens
Yellow zoanthid: See Epizoanthus
scotinus
Yoldia cascoensis: Yoldia
myalis
Yoldia
myalis
Yoldia scissurata: See Yoldia
seminuda
Yoldia
seminuda
Yoldiidae(Family)--Key
Z
Zirfaea
pilsbryi
Zirphaea gabbi: See Zirfaea
pilsbryi
Zirphaea pilsbryi: See Zirfaea
pilsbryi
Zoantharia
(Subclass)--Key
Zoanthid: See Epizoanthus
scotinus
Zoanthidea (Order)--See Epizoanthus
scotinus
Zoned cerith: See Batillaria
attramentaria
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Walla University