Eubranchus? from Massachusetts

April 8, 2002
From: Alan Shepard

Bill -
I really need help on the ID of this nudibranch. I took the photo on February 24, 2002 at Folly Cove in Gloucester, Massachusetts, USA in approximately 20 feet of water. The nudibranch is about 5 mm long.

I have never encountered this one before and I was particularly taken by the light blue tips to the cerata. I tried looking through Bleakney's book but it's not helping or I'm missing something.

Alan Shepard

Shepard, A., 2002 (Apr 8) Eubranchus? from Massachusetts. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Alan,
I am pretty sure this is a species of Eubranchus, perhaps E. exiguus, but this group are quite difficult to identify to species without local knowledge. Hopefully someone with a knowledge of the North Atlantic fauna will recognise it
Best wishes,
Bill Rudman

Rudman, W.B., 2002 (Apr 8). Comment on Eubranchus? from Massachusetts by Alan Shepard. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from


Eubranchus exiguus

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