We chose "Capt. Nautica" for snorkeling. Our captain was Rick & his mate was Max. Both were great. Max was very helpful and Rick was excellent. Rick was very courteous, friendly, and helpful with the snorkeling. He was very safety oriented. I would trust him with anyone. Unfortunately the waters were murky and there very few fish or turtles to be seen. Only saw yellow tailed snappers when Rick through in some bait. I think St. Thomas is too developed to have waters clear enough for decent snorkeling with a large quantity of fish. I would skip snorkeling in St. Thomas.