Okenia rosacea (Macfarland, 1905)
Common name(s): Hopkin's rose nudibranch
|Synonyms: Hopkinsia rosacea|
|(Okenia rosacea, San Simeon, CA. Approx. 1 cm long.|
|(Photo by: Dave Cowles, May 1999)|
How to Distinguish from Similar Species: No other dorid is rose pink and has cerata-like outgrowths of the dorsum. Triopha catalinae and Limacia cockerelli have orange projections but have a white dorsum.
Geographical Range: Coos Bay, OR to Puerto Santo Tomas, Baja California. Especially common near Monterey Bay
Depth Range: Low intertidal to 6 m
Habitat:_Rocky intertidal, especially in lower midlittoral tidepools, mostly on open coast.
Biology/Natural History: Feeds on the bryozoan
Eurystomella bilabiata, which is also a rosy color. Lays
eggs in a narrow rose-colored ribbon spiraled counterclockwise. The
nudibranch Navanax inermis eats this species. There are no
diverticula in the cerata-like
growths. Named after Timothy Hopkins, a railroad executive who helped
establish Hopkins Marine Station.
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Behrens and Hermosillo, 2005
Morris et al., 1980
A photo taken at Moss Beach, Laguna del Mar, CA by Dave Cowles, April 1993