Information on Coriocella spp

October 28, 1998
From: Yves Muller

Dear Bill,

During a dive in the Ari atoll (Maldives), I have observed the mollusca genus Coriocella, probably species hibyae pictured page 58 in the "seaslug and seasnail of H. Debelius. But I can't found information about this genus and species Coriocella and its biology. This genus belong naturally in family Lamellariidae. Have you some more information or references on Coriocella. Thank you.

Yves Muller

Muller, Y., 1998 (Oct 28) Information on Coriocella spp. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Yves,
Your question was passed to me from the Museum's search & discover centre. Although Coriocella is not a sea slug these animals are often mistaken for slugs so it is good to have something about them in the Sea Slug Forum.

Have a look at the top of the page of some general information. Firstly the family name is now considered to be Velutinidae instead of Lamellariidae. Sorry about that. Unfortunately there is very little known about the biology of these animals othr than most seem to feed on compound ascidians (tunicates). Their shell is usually buried in the fleshy mantle wall and so they have adopted some nudibranch defensive mechanisms such as colour camouflage, in some cases, and bright (probably warning) colours, in other cases.

Most species have been named from the dead shells, which are often very similar in shape. Until someone undertakes some detailed research on the Family we are going to continue to have identification problems. There are lots of good photographs of living animals but no attempt has been made as yet to match the living animals with the dead shells.

I hope this is of some value. If you have photos or questions on sea slugs please send them .... Bill Rudman.

Rudman, W.B., 1998 (Oct 28). Comment on Information on Coriocella spp by Yves Muller. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

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