Aldisa sanguinea, a fairly uncommon nudibranch

August 8, 2003
From: Bruce Wight

Dear Bill,
Johanna and I saw lots of great natural behavior on last weekends dive trip out to San Miguel Island [Channel Islands National Park, California - July 2003]. Here is one of a series of messages showing some images I took during the two day trip.

This photo is of a specimen of Aldisa sanguinea a fairly uncommon nudibranch.

Best wishes,
Bruce Wight

bwproductions@earthlink.net

Wight, B., 2003 (Aug 8) Aldisa sanguinea, a fairly uncommon nudibranch. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/10651

Thanks Bruce,
I have included a close-up alongside to show the very characteristic dark spots found in the dirsal midline of many species of Aldisa. They are usually outlined in a lighter colour and seem to be an attempt to mimic the oscula or common siphons found in many large sponge colonies.
Best wishes,
Bill Rudman

Rudman, W.B., 2003 (Aug 8). Comment on Aldisa sanguinea, a fairly uncommon nudibranch by Bruce Wight . [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/10651

Factsheet

Aldisa sanguinea

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