Phacellophora camtschatica (Brant, 1835)
Common name: Fried-egg Jellyfish
|Phacellophora camtschatica collected in Rosario Bay. Bell width is approximately 15 cm.|
|Photo by: Dave Cowles, July 2006|
How to Distinguish from Similar Species: Cyanea capillata is similar but P. camtschatica can be identified by a transparent margin consisting of 16 large lobes that alternate with smaller lobes.
Geographical Range: Worldwide; on the western United States coast from Alaska to southern California.
Depth Range: Pelagic
Habitat: In temperate oceans.
Biology/Natural History: Spends much the time motionless or slowly pulsing the bell while drifting with tentacles extended 10-20 feet or more. Feeds on gelatinous zooplankton, especially other medusae. Usually with symbiotic amphipods on the subumbrella and juvenile crabs on the exumbrella, including Cancer gracilis. Also hosts the barnacle Alepas pacifica and juvenile fishes. Has only a mild sting. In the life cycle, fertilized eggs develop into ciliated planula larvae which swim, then settle and metamorphose into scyphistomae polyps. Mature scyphistomae had 30-44 tentacles and reproduce asexually by side budding as well as strobilating to produce ephyrae which grew up into mature medusae. In the laboratory it took about 9 months for an ephyra to grow into a mature medusa.
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Kozloff (1987, 1996)
Smith and Carlton, 1975
Wrobel and Mills (1998)
Reum, Jonathan P., Mary E. Hunsicker, and Caroline E. Paulsen, 2010. Species composition and relative abundance of large medusae in Puget Sound, Washington. Northwest Science 84:1 pp. 131-140
Widmer, Chad L., 2006. Life cycle of Phacellophora camtschatica (Cnidaria: Scyphozoa). Invertebrate Biology 125:5 83-90
These become more common in the Rosario area in late summer.
This top-down view of an individual in an aquarium shows the 16 clusters of tentacles and the gut.
This view of the underside of an individual swimming upside-down at the water's surface clearly shows the tentacles which occur in 16 linear clusters.
|These views of a Phacellophora camtschatica swimming near the surface of Rosario Bay show the extremes of configuration before and after a swimming stroke.|
An underwater view of a swimming individual by Kirt Onthank, July 2007