Nudibranchs from the Yellow Sea - Tritonia festiva

June 30, 2006
From: Dong Bum Koh

Dear Bill,

As I mentioned in my first message [#16960], sea slugs from the Yellow Sea (between China & Korea) are not well-known because poor visibility & very strong currents makes its bad for diving..

Here is another species photographed last weekend by a colleague of mine. It is Tritonia festiva

Locality: Gogunsan islands, [Diving site : E 126°4' N 35°8'] 10m, Korea, Yellow Sea, 18 June 2006, Length: unknown. Photographer: Sung Soon Choi.

Best regards.
Dong Bum Koh

drkoh@seasee.co.kr

Koh, D.B., 2006 (Jun 30) Nudibranchs from the Yellow Sea - Tritonia festiva. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/17010

Dear Koh,
Thanks for this nice record of Tritonia festiva. A well-known member of the fauna of the Nth American west coast, it is also known from Japan and you have reported it from the south east coast of Korea, so it is nice to be able to include the Yellow Sea as well. I assume the soft-coral in the photo is its food. I have included close-ups to show the similarity in shape and size between the gills and rhinopores of the nudibranch and the soft-coral's polyps, probably another attempt at camouflage by the nudibranch. It would be interesting to know if the colour variation in this species, from this reddish or pinkish brown to translucent white, correlates with the colour of the soft-corals they are feeding on.
Best wishes,
Bill Rudman

Rudman, W.B., 2006 (Jun 30). Comment on Nudibranchs from the Yellow Sea - Tritonia festiva by Dong Bum Koh. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/17010

Factsheet

Tritonia festiva

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