Navanax aenigmaticus from Brazil

June 14, 2005
From: Wagner Torres

Dear Bill,
Here is another opisthobranch from Brazil. I don't know if this animal with blue spots (small iridescent blue ring) is a Stylocheilus longicauda (maybe???)

I noticed it in my reef tank on the glass. I'd like to know what they are? I cannot identify!!

Can you help me? Thanks very much and kind regards from Brasil - And excuse my bad English

Best wishes,
Wagner Torres

Torres, W., 2005 (Jun 14) Navanax aenigmaticus from Brazil. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Wagner,
Don't worry about the bad English. This is Navanax aenigmaticus. It has not been recorded from Brasil under that name, but Ernst Marcus described a species Chelidonura evelinae from Sao Paulo [Marcus, 1955] which is surely the same. We have a tentative record from Rio de Janeiro in an earlier message [#11327] so its good to get a photo to confirm the find. I would appreciate any information on where the animal could have come from.
Best wishes
Bill Rudman

Rudman, W.B., 2005 (Jun 14). Comment on Navanax aenigmaticus from Brazil by Wagner Torres. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

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