It is a gray reef shark (Carcharhinus sp.) and I was about 15 feet away. This site is on the south shore of Roatan, part of Cordelia Banks (also known as Insidiuos Reef), where Waihuka DIvers conducts their shark encounter dives. With help from WWF and Roatan Marine Park, we are pushing to get this area declared protected, as several scientific papers have shown that this might be the healthiest Acropora sp (staghorn and elkhorn coral) site in the entire Caribbean!
Great work, Cassandra! We hope to see you for Thanksgiving.