Atlantic blue chromodorids - a comparison

October 14, 2003
From: Marina Poddubetskaia

Dear Bill,
Mediterranean and Atlantic blue dorids are very confusing for most of divers. So, I tried to assemble different characteristics of 6 similar species (Hypselodoris fontandraui, H. tricolor, H. bilineata, H. cantabrica, H. orsinii and H. villafranca) in the guise of comparative table. I made it from my personal observations and from the numerous photos of Erwin's website.

So, here is the comparative table and the comparative draw of main futures (sorry, it's a little childlike :-) that I suggest on my website. I'd like to have an opinion of Mediterranean and Atlantic specialists to know if I'm wrong in some of these points.
Thank you in advance for displaying this message on your Forum.
Best wishes,
Nembro website

Thanks Marina,
I look forward to comments from those with a personal familiarity with these animals. One problem maybe the juvenile colour forms some species seem to have
Best wishes,
Bill Rudman

Poddubetskaia, M., 2003 (Oct 14) Atlantic blue chromodorids - a comparison. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from