Ceratosoma sinuata from the Solomon Ids

October 19, 2000
From: Bruce Potter

Note added 30 April 2007: Until now on the Forum C. sinuata and C. flavicostata have been considered forms of one species. See message #19854 where they and C. magnifica are considered separate species.

Bill,
I have found several examples of the "normal" green form of Ceratosoma sinuata over the years.
Yesterday I found a pink form, which I have only ever seen once before. The only other time I have found it was about 10 months ago, on exactly the same bommy. Surely it cannot be the same individual can it? I check this particular bommy every week, and have not seen the creature for 10 months. It appears to be the only one on the bommy, just as I only found one there last time.
This is at about 15 meters, on a rubble and coral site.

I have included a picture of a green one I found at "Velvia" in the Florida Islands (Solomons), and two of the red one I filmed off Honiara yesterday.
Bruce Potter

bruce.potter@adventist.org.sb

Potter, B., 2000 (Oct 19) Ceratosoma sinuata from the Solomon Ids. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/3106

Dear Bruce,
Thanks for the beautiful photos which show the shape so well. And to your question about how long they live and whether they would stay at the same spot for 10 months or more. By coincidence I have recently received the identical question from Donata and Akos about a similar occurrence in Sydney.

Have a look at my answer to them. I don't know how many different people need to make a similar observation before I begin to think they do stay in the same spot for over a year, but it is certainly interesting.

Best wishes,
Bill Rudman.

Rudman, W.B., 2000 (Oct 19). Comment on Ceratosoma sinuata from the Solomon Ids by Bruce Potter. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/3106

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Ceratosoma sinuatum

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