October 15, 2003
From: Colin Redfern
Following your comments on the photo of a Jamaican animal contributed by Ross Gundersen, I've re-examined my photos of this species from the Bahamas. Attached is an additional dorsal view of the 9mm specimen figured in Bahamian Seashells (fig. 711A). It was collected from floating Sargassum off Fish Cays, Abaco, Bahamas on June 29, 1995. Unfortunately the depth of field is poor in these photos, but I'm attaching a lateral view of the same specimen, taken on the side of a petri dish. The quality of this photo is also poor, but it certainly confirms your observation of the presence and location of dorsal gills. Thanks for pointing out that this can't be a corambid.
Redfern, C., 2003 (Oct 15) Corambe? from the Bahamas. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/11226
It definitely has gills and quite distinctive papillae which would certainly fit an onchidorid. I guess it will need a look at its anatomy to be sure but it certainly doesn't appear to belong to the Corambidae.
I don't know of an onchidorid being recorded from the warm water Atlantic. We normally think of them as coldwater animals but I remember finding what I am sure is the European Onchidoris depressa in Noumea, New Caledonia [see message] which I presume had got there with shipping. It is possible therefore that your animal is a 'hitchhiker'.
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