Re: Food of Tritonia nilsodhneri
October 24, 2001
From: Helmut Zibrowius
Dear Bill,
At Bernard Picton's request I have had a look at the gorgonians in the Forum on which Tritonia nilsodhneri has been photographed and suggest the following identifications. I have sent a separate message concerning the gorgonians that Marionia blainvillea has been photographed on.
• The gorgonian in Erwin Koehler's photo from Cala Joncols is Eunicella singularis
(the expanded polyps show zooxanthellae pigmentation), bark is whitish.
• The gorgonian in Bernard Picton's photo from Galicia, Spain is, as suggested by Bernard, a species of Leptogorgia.
• I am not an expert on North Atlantic gorgonians but in spite of colour differences
I think all the photos in Bernard Picton's message from England and the Channel Ids could be Eunicella verrucosa.
• I agree with Baki Yokes' identification of the gorgonian in his photo from Saros Bay, Turkey as a whitish form of Eunicella singularis (but mostly contracted; when polyps are out, they look whitish - E. singularis also can occur without zooxanthellae; this may be the case here).
There is plenty of information on the genus Leptogorgia in:
Grasshoff M., 1992. Die Flachwasser-Gorgonien von Europa and Westafrika (Cnidaria, Anthozoa). Courier Forschungsinstitut Senckenberg, 149: 135pp.
Helmut Zibrowius
Centre d'Oceanologie de Marseille Station Marine d'Endoume
Marseille
France
hzibrowi@com.univ-mrs.fr
Zibrowius, H., 2001 (Oct 24) Re: Food of Tritonia nilsodhneri. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/5511Thanks Helmut,
It is often very difficult to get the food of nudibranchs identified unless you manage to diligently photograph, collect and correctly preserve the specimen and know a reliable expert in the relevant group of animals who has the time to help. So any help you can provide with identifications, will be gratefully received.
Best wishes,
Bill Rudman.
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