Described from Japan, and reported here from the Philippines.
Dauin, Negros, Philippines. Many specimens. Size: less than 1cm, Depth about 15m. October 1998. PHOTO: Erwin Koehler.
• Baba, K. (1949) Opisthobranchia of Sagami Bay. Iwanami Shoten, Tokyo. 211pp + pls.
Rudman, W.B., 1998 (December 18) Gymnodoris subflava Baba, 1949. [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/gymnsubf
December 18, 1998
From: Erwin Koehler
These photos were made at Dauin, Negros, Philippines, in October. There were many of these yellow ones - I don't even know, if they are Opisthobranchs: Size - less than 1cm, Depth about 15m.
E.Koehler@deutschepost.deKoehler, E., 1998 (Dec 18) Yellow nudibranch? from Philippines. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/405
These are probably Gymnodoris subflava which was described from Japan. I would only be able to confirm the identification by looking at the radula, as there are many similarly coloured species.
Gymnodorids are an interesting family of carnivorous nudibranchs which feed on other opisthobranchs. Some of these small species are often found in quite large numbers.
Bill RudmanRudman, W.B., 1998 (Dec 18). Comment on Yellow nudibranch? from Philippines by Erwin Koehler. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/405