Aeolidia papillosa from French Atlantic

August 17, 2009
From: Marina Poddubetskaia Ossokine

Dear Bill,

I know you have many photos of Aeolidia papillosa on the Forum but these animals from Arcachon Bay are so different from all of them, that firstly I didn't recognize them. Lucas Cervera identified it for me. So, I think it could be valuable to add this colour form to the Forum.

Locality: "Hortense Sud", Cap Ferret, Arcachon Bay, 5 m, France, Atlantic, 01 June 2009. Length: upper photo: 6 mm; other photos : 12 mm. Photographer: Marina Poddubetskaia.

Best wishes,
Nembro website

Poddubetskaia Ossokine, M., 2009 (Aug 17) Aeolidia papillosa from French Atlantic. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Thanks Marina,

I am surprised to see that most of our photos of this classic 'European' species come from the east coast of Nth America, so it is good to get a Mediterranean record to redress the balance. When I first saw your photos I was puzzled by the general shape until I realised these are quite juvenile specimens. The opaque white pigmentation forming a Y shape on the oral tentacles and head and leads back behind the rhinophores to form a large patch and a semicircular pattern is often lost or partially lost in larger animals, but Thompson & Brown (1984) considered it to be a useful identifying character in this species.

Best wishes,
Bill Rudman

Rudman, W.B., 2009 (Aug 17). Comment on Aeolidia papillosa from French Atlantic by Marina Poddubetskaia Ossokine. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from


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