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

nurse shark ginglymostoma cirratum coral sandy bottom belize marine life underwater ocean tropical wildlife reef ecosystem swimming sea fish aquatic nature conservation snorkeling habitat biodiversity behavior tourism ecology water activities creatures coastal animal environmental exploration adventure floor dive site natural environment biology habitats tour healthy species