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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
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
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
Buried Urticina: See Urticina
coriacea
Burkenroad blunt-tail shrimp: See Bentheogennema
burkenroadi
Burrow pea crab: See Scleroplax
granulata
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 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
antennarius
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: See Dirona
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
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
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
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
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
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
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 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
salpinx
Haliclystus
stejnegeri
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
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
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
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
Isopoda
(Order)--Key
J
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
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
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 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
Metacarcinus
gracilis
Metacarcinus
magister
Metacrangon
munita
Metandrocarpa
taylori
Metridium
giganteum
Metridium
senile subsp. fimbriatum
Micrura verrilli
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
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
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
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
Ophiuroidea
(Class)--Key
Oplophoridae
(Family)--Key
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 chinese hat snail: See Calyptraea
fastigiata
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
tridens
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: See Idotea
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
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
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
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
antennarius
Rough keyhole limpet: See Diodora
aspera
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 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
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
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
Swimming anemone: See Stomphia
didemon
Sylon
hippolytes
Symbiotic scaleworm: See Arctonoe
fragilis, Arctonoe
pulchra, Arctonoe
vittata
Syringella amphispicula
Systellaspis
braueri
Systellaspis
cristata
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
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-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