Risbecia tryoni from the Philippines

April 3, 2007
From: Dr. Christine Meier

Dear Bill,
We found this pair of nudibranchs during a wall dive at Cebu, Philippines, on a clam. Can you confirm that the belong to Risbecia tryoni?

Locality: Dive site: Whitehouse Point, about 15 m, Cebu, Phillipines, Pacific, 04 March 2007, carol reef, wall. Photographer: Tine Meier.

Thanks + best regards,

Tine and Schade

tinemeier@web.de

Meier, T.S., 2007 (Apr 3) Risbecia tryoni from the Philippines. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/19782

Dear Tine,

Nice find. They are Risbecia tryoni. Although I shouldn't be veering away from sea slugs, the 'clam' they are on is more correctly an oyster of the subfamily Lophininae. Although Americans tend to use the common name 'clam' for all bivalves, the rest of the world tends to use 'clam' as a common name only for the species of the family Tridacnidae. This solves the problem I noticed in a book recently, where the common name of Tridacna maxima is Large Giant Clam and for Tridacna gigas it is Giant Giant Clam.

Best wishes,
Bill Rudman

Rudman, W.B., 2007 (Apr 3). Comment on Risbecia tryoni from the Philippines by Dr. Christine Meier. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/19782

Factsheet

Risbecia tryoni

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