Calma glaucoides

September 16, 1999
From: Gonçalo Calado

Dear slugophiles

I'm a Portuguese PhD student working with one single species at the moment:

Calma glaucoides (Alder & Hancock, 1854) (UPPER PHOTO) is an atypical aeolid nudibranch inhabiting European (Atlantic and Mediterranean) Western and Southern coasts. Adults feed on fish eggs and are found near their spawns underside boulders or in small crevices where male fish nests. This aeolid has a very atypical uniseriate radula (LOWER PHOTO), with a serrated bar. Little is known about its formation or function, but it is believed that such a peculiar morphology is related to adult's feeding habits.

If anyone has preserved specimens they could send me, or could preserve specimens for me, I would be very grateful. I am particularly interested in material from outside the Atlantic coasts of Spain and Portugal.

For those living outside its distribution range, I suggest to look carefully on fish spawns (gobids, blennids, etc). It might be you find something interesting...
Many Thanks,

Goncalo Calado
Quinta de S. Lourenço, Lote 11, 1o Esq.
Oleiros 2925-260 Azeitao
Tel. +351-1-2180337

Calado, G., 1999 (Sep 16) Calma glaucoides. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Gonçalo,
Thanks for sharing some of the information you presented at Menfi. The radula is indeed unusual. Hopefully someone will be able to help you with material from elsewhere in Europe.
Bill Rudman.


Calma glaucoides

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