Chromodoris krohni from French Mediterranean
June 25, 2007
From: Dominique Horst
Hello Bill,
Meeting a Chromodoris krohni is not very frequent in our area.
Locality: Cannes, 25 m, France, Mediterranean sea, 8 May 2007. Length: 9 mm. Photographer: Dominique HORST.
I've observed this one a long time and I was surprised to see the slug voluntarily releasing itself to be taken by the current when it reached the end of the algae on which it was crawling.
Kind regards,
Dominique
dominique.horst@wanadoo.fr
Horst, D., 2007 (Jun 25) Chromodoris krohni from French Mediterranean. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/20030
Dear Dom,
I must say I have never seen a nudibranch actually release itself like that - quite a risky behaviour. Looking at one of your photos I noticed some white bumps along the underside of the mantle edge. These must be the mantle glands [= mantle dermal formations] in which chromodorids accumulate the secondary metabolites they acquire from their sponge food. It's not usual for species of Chromodoris to have small discrete glands like this, usually their glands are very branched and digitiform.
Best wishes,
Bill Rudman
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