Re: Chromodoris annulata colour form from the Persian Gulf

May 4, 2010
From: Lawrence Neal


Concerning message #23600:

Dear Bill,

Referring to your reply to message #23600 ... here is a photo of the variant of Chromodoris annulata with a line joining the two purple rings from the Andaman Sea (very sorry to disprove the longstanding belief that this 'spectacled' form was restricted to the Persian Gulf). However, like the 'spotless' form also present in the Andaman Sea [see message #9203], this variant is much less common than the 'standard' form.

I also attached a shot of the 'standard' form feeding on the purple-black sponge, which confirms previous observations.

Locality: Condreco Wreck, Thai Muang, 15 metres, Phangnga, Thailand, Andaman Sea, Sponge-encrusted shipwreck. Photo 1: 22 April 2010, Length: 30 mm. Photo 2: 14 November 2009, Length = 50 mm. Photographer: Lawrence Neal.

Best regards,

Lawrence

lorenzo_n@yahoo.com

Neal, L., 2010 (May 4) Re: Chromodoris annulata colour form from the Persian Gulf. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/23605

Dear Lawrence,

Thanks for exploding the idea that the Persian Gulf was harbouring a strange colour form. It didn't really make biological sense. I had also forgotten Danny Van Belle's message [#9135] showing an animal from Thailand with nearly complete 'spectacles'.

Thanks also for another record of C. annulata feeding on Chelonaplysilla violacea - there is no doubt about the identity of the sponge - and the bite marks -, in your photo. I suspect the 'spectacled' animal is also sitting on a colony of this sponge as well, but despite enlarging your photo, I can see no sign of sponge fibres so I can't be sure.

Best wishes,
Bill Rudman

Rudman, W.B., 2010 (May 4). Comment on Re: Chromodoris annulata colour form from the Persian Gulf by Lawrence Neal. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/23605

Factsheet

Chromodoris annulata

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