Dendronotus sp. 3

Family: Dendronotidae


Alaska to California (Behrens, 1991)


Oil Rigs off San Pedro, California, USA, April 2004. Photo: Bruce Wight

Animal translucent reddish brown with scattered opaque white spots all over. The cerata are lined with opaque white. No lateral processes on rhinophore sheath. Grows to at least 40 mm. Known in Behrens (1991) as Dendronotus sp. 1.

  • Behrens, D. W. (1991) Pacific coast nudibranchs: a guide to the opisthobranchs, Alaska to Baja California, vi + 107 pp., 217
    photos. Second Edition. Sea Challengers, Monterey, California.
Authorship details
Rudman, W.B., 2005 (February 9) Dendronotus sp. 3 [In] Sea Slug Forum. Australian Museum, Sydney. Available from

Related messages

Dendronotus on oil rigs off California

February 9, 2005
From: Bruce Wight

I was out at the oil Rigs off San Pedro, California, for the first time in April 2004 and saw this Dendronotus I need help in identifying.

Take care,
Bruce Wight

Dear Bruce,
I am afraid your message is part of my large backlog but it deserves posting as the Dendronotus seems very interesting. I am pretty sure it is the animal Dave Behrens has as Dendronotus sp. 1 in his Pacific Coast Nudibranchs (Edition 2).

I have made a Fact Sheet for it as Dendronotus sp. 3
Best wishes,
Bill Rudman

Rudman, W.B., 2005 (Feb 9). Comment on Dendronotus on oil rigs off California by Bruce Wight. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from