My friend Chris found these guys yesterday afternoon in about 25 feet of water in Roatan. They move (surprisingly quickly) like a slug and are very small. Probably a millimeter or possibly 2. Showing the photo around West End didn't help with ID so I thought I'd bring it to you. First, the shot of the coral they were on:
I knew I could rely on this place. Thanks Leslie. I'll try to get a better shot over the summer but I suspect that with my g9 this is about as good as I'm going to get. I showed your post to the DM who found them and he was super happy to have more info.