Re: Glossodoris rufomarginata feeding [3]

November 17, 2008
From: Scott Johnson

Concerning message #22046:

Hi Bill,
To complete (at least for now) the images of Glossodoris rufomarginata, here are three more shots from the Marshalls. e201-040107 is the largest specimen we've seen, measuring just over 50 mm. e201-040421-k01 is a bit deformed, with both rhinophores extending from the same pocket. e201-k04-070521 shows two quite different-looking specimens that were on the same chunk of sponge. All three photos with this post are of animals that rode the express train-chunks of their prey sponge ripped off the reef on the seaward side and rolled several hundred meters across to come to rest on the lagoon slope.

Locality: Kwajalein Atoll, 8-10m, Marshall Islands, Pacific, 4 September 2001, 21 April 2004, 21 May 2007, coral reef. Length: 20-50mm. Photographer: Scott and Jeanette Johnson.

There are a couple of additional photos on the Marshall Islands nudibranch site at


Johnson, S., 2008 (Nov 17) Re: Glossodoris rufomarginata feeding [3]. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Scott,

If we needed any further evidence of the sponge-nudibranch relationship, the mention on your excellent website that G. rufomarginata is only present when the sponge is present, is pretty good confimration.

Best wishes,
Bill Rudman

Rudman, W.B., 2008 (Nov 17). Comment on Re: Glossodoris rufomarginata feeding [3] by Scott Johnson. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

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