Colour form of Pteraeolidia ianthina

October 29, 2008
From: Ann Clear

Hi Bill,
We have just returned from diving in the wonderful Lembeh Strait. I saw this nudibranch on my ascent, he was quite large and was moving very swiftly across the sandy bottom of a reef. I think it is of the Flabellinidae family, but have been unable to identify him. He was really lovely.

Locality: Lembeh Strait, 10 - 12 meters, Indonesia, Molucca Sea, 11 October 2006, Sandy Bottom. Length: 5 - 7 cms. Photographer: Ann Clear.

Thank you
Regards,
Ann Clear

ann.clear@btinternet.com

Clear, A, 2008 (Oct 29) Colour form of Pteraeolidia ianthina. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/18970

Dear Ann,

From the gemeral shape and colour of the head, this is clearly Pteraeolidia ianthina, but I must say I have never seen such a pale orange colour form like this before. As you will see from the Fact Sheet, adults usually have brown zooxanthellae in their bodies which gives them a dark brown colouration. Perhaps this one has lost its zooxanthellae?

Best wishes,
Bill Rudman

Rudman, W.B., 2008 (Oct 29). Comment on Colour form of Pteraeolidia ianthina by Ann Clear. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/18970

Factsheet

Pteraeolidia ianthina

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