Sea Slugs from Costa Rica

March 24, 2010
From: Victor Cespedes


Hi, just took this pics and I was looking for the correct identification.
From all I could compare it's Elysia diomedea. Just wanna be sure. And the other one [lower photo] may be Navanax aenigmaticus.

Interesting fact I read Navanax aenigmaticus feeds of Tridachia crispata. Would they eat Elysia diomedea too ??? Or its just an identification error, because I also read they used to name E. diomedea as T. crispata ...

Locality: Playa Blanca, Punta Leona, 0, Puntarenas, Costa Rica, Pacific, 1 march 2010, intertidal. Length: .... Photographer: Víctor Céspedes Castro.

Víctor Céspedes Castro

cespedes.v@gmail.com

Cespedes, V., 2010 (Mar 24) Sea Slugs from Costa Rica. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/23383

Dear Victor,

Have a look at my message #16728 for a discussion on the differences between E. diomedea, E. crispata and a recently recognised species E. clarki. Your animal is Elysia diomedea. If you follow the links and go to the relevant Fact Sheets you will find out more about these three species. We no longer use the names Tridachia and Tridachiella so the three species are all considered to be species of Elysia at present.

Concerning Navanax aenigmaticus: I have noted on the Fact Sheet that Humann reports that it feeds on Elysia crispata in the Caribbean. I guess it's highly probable that it feeds on Elysia diomedea in the East Pacific.

Best wishes,
Bill Rudman

Rudman, W.B., 2010 (Mar 24). Comment on Sea Slugs from Costa Rica by Victor Cespedes. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/23383

Factsheet

Elysia diomedea

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