Chromodoris magnifica - feeding record

March 12, 2010
From: Bill Rudman

Ed Dixon recenty sent me a note to say he had posted some new sets of pics of South Georgia on his Flickr site:

http://www.flickr.com/photos/efdixon/sets/72157623579199462/

http://www.flickr.com/photos/efdixon/sets/72157623454735811/

Although they don't include nudibranchs they are a stunning collection of wildlife and scenic shots from this remote southern island. After a look at South Georgia, I went looking at other of his folders and found this interesting shot of Chromodoris magnifica feeding, which Ed has given me permission to post on the Forum.

Locality: Wakatobi, Sulawesi, Indonesia, Banda Sea, 31 August 2007. Photographer: Edward F Dixon.

I am pretty sure this is the dysideid sponge Lamellodysidea herbacea which is also fed on by the similarly coloured Chromodoris lineolata [see message #19136]. Most species of Chromodoris feed on Dendroceratid sponges of the family Darwinellidea but there are a group of species, mainly with black longitudinal lines down their mantle which feed on an odd assortment of sponges which appear to be linked by a special chemical produced by these sponges called latrunculin. A commonly photographed example is C. quadricolor which feeds on the bright orange Negombata magnifica. On the Forum we have examples of it also feeding on species of thorectid sponges [see message #20150 where I also discuss the chemical link]. A few of these black-lined species, such as C. lineolata, also feed on some Dictyoceratid sponges of the family Dysideidae. Like C. quadricolor, records on the Forum show that C. magnifica also feeds on orange species of Negombata. It is great to get a record of it also feeding on a quite unrelated species of Lamellodysidea.

Thanks Ed,

Bill Rudman

Rudman, W.B., 2010 (Mar 12) Chromodoris magnifica - feeding record. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/23335

Photo: Edward F Dixon.

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Chromodoris magnifica

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