Underwater marine life on coral reefs, Thailand

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

Coral reef and sea life banner, The Maldives, Indian Ocean

Caribbean land hermit crab (Coenobita clypeatus), Half Moon Caye, UNESCO, Mesoamerican Barrier Reef, Belize

A myriad of hard and soft corals at Vatu-I-Ra Conservation Park on Viti Levu, Fiji, South Pacific, Pacific

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 shark and ray alley, Caye Caulker, Mesoamerican Barrier Reef, Belize

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

Spotted eagle ray (Aetobatus narinari), Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

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

A myriad of hard and soft corals at Vatu-I-Ra Conservation Park on Viti Levu, Fiji, South Pacific, Pacific

Spotted eagle rays (Aetobatus narinari) underwater at Leon Dormido Island off San Cristobal Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Split image of pristine coral reef and island, Rongelap, Marshall Islands, Micronesia, Pacific

Survey divers on ascent over coral reef, mainly Acropora palifera, Namu atoll, Marshall Islands, Pacific

Scientific divers conducting a survey on a highly diverse coral reef, Namu atoll, Marshall Islands, Pacific

Technical Divers using Trimix, Rebreathers and technical diving equipment, Divetech, Grand Cayman, Cayman Islands, Caribbean

Diver conducts reef survey, Ailukatoll, Marshall Islands, Pacific

Technical Divers using Trimix, Rebreathers and technical diving equipment, Divetech, Grand Cayman, Cayman Islands, Caribbean

Technical Divers using Trimix, Rebreathers and technical diving equipment, Divetech, Grand Cayman, Cayman Islands, Caribbean

Diver observing Soft corals. Shark and Yolanda, Sharm El Sheikh, South Sinai, Red Sea, Egypt.

Technical Divers using Trimix, Rebreathers and technical diving equipment, Divetech, Grand Cayman, Cayman Islands, Caribbean

Technical Divers using Trimix, Rebreathers and technical diving equipment, Divetech, Grand Cayman, Cayman Islands, Caribbean

Caribbean reef shark. Bahamas.

Technical Divers using Trimix, Rebreathers and technical diving equipment, Divetech, Grand Cayman, Cayman Islands, Caribbean

Technical Divers using Trimix, Rebreathers and technical diving equipment, Divetech, Grand Cayman, Cayman Islands, Caribbean

Crab preying on dead portuguese man-of-war, Physalia physalis, Praia do Forte, Bahia, Brazil (South Atlantic)

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

A research diver from the MOC Marine Institute glues broken coral back together at Molokini Marine Preserve off the island of Maui, Hawaii. The coral is tagged and will be monitored, Maui, Hawaii, United States of America