Glossodoris sedna in Key Largo, Florida

August 9, 2003
From: Paul Osmond

In July we found another Glossodoris sedna on a bed of Sea Grass in the southern most of the reefs in Key Largo, Florida [centre two photos].

I know these are not native to the area so it is interesting to note that this is my second time seeing one in Florida this year. I saw the same species in Biscayne National Park in late March earlier this year [upper right photo].

Since these areas are 50+ miles apart I think it is reasonable to assume there are now several population groups of this Nudibranch in Florida.

Thanks,
Paul

marriard@deepseaimages.com

Osmond, P., 2003 (Aug 9) Glossodoris sedna in Key Largo, Florida. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/10527

Dear Paul,
Thanks for these photos. They are an interesting addition to our knowledge. I have included another photo of yours from Biscayne National Park [lower right] because it shows to interesting things. Firstly the right rhinophore is present in triplicate - another addition to the abnormality page.

Secondly I suspect the purplish-brown region in the bottom right of the photo is a sponge, and if so, it could be the food of G. sedna. All chromodorids that have been studied have a very specialised diet, eating only one, or a very few species of sponge. The first question that arises when we have an apparent introduction of a species into a new region is what it is eating? Has it found a suitable or local food species to replace its 'real' diet, or has its original food sponge also been introduced into the new region. In this case we don't know what its food is in either the eastern Pacific or the Caribbean so it woudl be interesting to find out
Best wishes,
Bill Rudman

Rudman, W.B., 2003 (Aug 9). Comment on Glossodoris sedna in Key Largo, Florida by Paul Osmond. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/10527

Factsheet

Glossodoris sedna

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