Ceratosoma amoena laying eggs

March 11, 2003
From: Leanne & David Atkinson

Dear Bill,
I was just reading your latest messages and saw your request for a picture of Ceratosoma amoena laying eggs. We have this one. We also have a shot of them mating with gills out so I've included it. Both photos were taken at Fly Point marine reserve, Port Stephens N.S.W., eastern Australia, during daytime, on the high tide, at 10 to 12metres.

Cheers,
Leanne & David Atkinson

atk@hunterlink.net.au

Atkinson, L & D., 2003 (Mar 11) Ceratosoma amoena laying eggs. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/9360

Dear Leanne & David,
Thanks very much. This photo of the egg ribbon is another valuable bit of information. If you compare the size of the eggs in this ribbon with those in your photo of the egg ribbon of Chromodoris splendida you will see C. splendida's eggs are quite a lot larger. Thompson (1972)reports that C. amoena has small eggs (90 microns in diameter), and planktotrophic larvae. Your egg ribbon is certainly compatible with that type of development.

• Thompson, T.E. (1972) Chromodorid nudibranchs from eastern Australia (Gastropoda, Opisthobranchia). Journal of Zoology, London, 166: 391-409,pls.1-4.

Best wishes,
Bill Rudman

Rudman, W.B., 2003 (Mar 11). Comment on Ceratosoma amoena laying eggs by Leanne & David Atkinson. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/9360

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Ceratosoma amoenum

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