Saw dolphin, manatee, a tarpon, a couple baby sharks, and lots of birds. Was disappointed in the island we stopped at for shelling. It wasn't very good. That spot was also the swimming spot, and it was just OK. There was no support for keeping us from being run over by boats other than to tell us to watch out for other boats. The captain seemed grumpy, but the first mate was really nice and helpful. The captain spilled gasoline in the back of the boat during the "swim" portion of the trip and that probably got dumped into the ocean...