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

nurse shark ginglymostoma cirratum belize marine life underwater reef ecosystem sandy seabed swimming fish clear water coral tropical species sea aquatic ocean nature wildlife behavior habitat biodiversity snorkel scuba diving conservation predator coastal waters environment preserve animal ecology health biota tranquil endemic tourism