Nurse shark (Ginglymostoma cirratum), on the sand in Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

nurse shark ginglymostoma cirratum marine life coral reef belize underwater aquatic habitat sea creatures biodiversity ecosystem swimming ocean conservation tropical fish preserve formations diving snorkeling floor environment natural protected area tranquil exploration ecological balance wildlife ecosystems undersea world behavior species coastal waters scenery nature plants sandy bottom research oceanography diversity