Underwater view of the reef along the circumference of the Great Blue Hole on Lighthouse Reef, UNESCO, Belize

Nurse sharks (Ginglymostoma cirratum), being fed in Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

Nurse sharks (Ginglymostoma cirratum), being fed in Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

Green sea turtle (Chelonia mydas), surfacing for air near Caye Caulker, inside the Mesoamerican Barrier Reef, Belize

Green sea turtle (Chelonia mydas), with snorkeler near Caye Caulker, inside the Mesoamerican Barrier Reef, Belize

Adult Magellanic oystercatcher (Haematopus leucopodus) on Carcass Island in the Falkland Islands

Horse-eye jacks (Caranx latus), schooling in Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

West Indian manatee (Trichechus manatus), on the sand near Caye Caulker, inside the Mesoamerican Barrier Reef, Belize

A myriad of fish and coral underwater at Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

A myriad of hard and soft corals, as well as tropical reef fish on the healthy reef near Volivoli Resort on Viti Levu, Fiji, South Pacific, Pacific

A myriad of hard and soft corals compete for space on the substrate of Darwin's Wall, Palau, Micronesia, Pacific

Horse-eye jacks (Caranx latus), schooling in Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

Underwater view of the reef along the circumference of the Great Blue Hole on Lighthouse Reef, UNESCO, Belize

West Indian manatee (Trichechus manatus), with sharksucker, Caye Caulker, inside the Mesoamerican Barrier Reef, Belize

Caribbean spiny lobster (Panulirus argus), underwater at Half Moon Caye, UNESCO, Mesoamerican Barrier Reef, Belize

A myriad of fish and coral underwater at Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

A myriad of fish and coral underwater at Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

Olive ridley turtle hatchling, Lepidochelys olivacea, Costa do Sauipe, Bahia, Brazil (South Atlantic)

Olive ridley turtle hatchling, Lepidochelys olivacea, Costa do Sauipe, Bahia, Brazil (South Atlantic)

French angelfish, Pomacanthus paru, Ilha rata, Fernando de Noronha national marine sanctuary, Pernambuco, Brazil (S. Atlantic)

Pennant butterflyfish, juvenile, schooling Heniochus diphreutes, Portlock, Oahu, Hawaii (N. Pacific).

Research divers from the MOC Marine Institute glue broken coral heads back together and map out coral damage at Molokini Marine Preserve off the island of Maui, Hawaii. In the future, data from here will help to determine the health of Hawaii's reefs, Maui, Hawaii, United States of America

Research divers from the MOC Marine Institute map out coral damage at Molokini Marine Preserve off the island of Maui, Hawaii. In the future, data from here will help to determine the health of Hawaii's reefs, Maui, Hawaii, United States of America