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A school of orange basslets (Pseudanthias squamipinnis) on a healthy Fijian reef full of hard and soft corals, Fiji.

An underwater photographer swims past a large yellow gorgonian fan with a bed of red soft corals beneath it, Fiji.

A common spiny lobster backs his way into the protection of the reef, Bonaire, Caribbean Netherlands.

Scuba diver on her underwater propulsion vehicle getting a close-up look at an upside-down jellyfish, Bonaire, Caribbean Netherlands.

1 cm yellow tube polyp captured at 4.5x life size with what appears to be a small macroscopic Isopod feeding on it, Bonaire, Caribbean Netherlands.

A large group of purple tube sponge sits high on the reef, Bonaire, Caribbean Netherlands.The Hilma Hooker Shipwreck is visible in the background.

Scuba diver navigates the waters using a diver propulsion vehicle off the coast of Bonaire, Caribbean Netherlands.

The hawksbill sea turtle (Eretmochelys imbricata) swims in the waters off the coast of Bonaire, Caribbean Netherlands. The hawksbill is a critically endangered sea turtle belonging to the family Cheloniidae.

The hawksbill sea turtle (Eretmochelys imbricata) swims in the waters off the coast of Bonaire, Caribbean Netherlands. The hawksbill is a critically endangered sea turtle belonging to the family Cheloniidae.

Scuba diver uses a diver propulsion vehicle to navigate the waters off the coast of Bonaire, Caribbean Netherlands.

Hawksbill sea turtle (Eretmochelys imbricata), a critically endangered species, feeding on soft coral, side view, South Ari Atoll, Maldives.

Hawksbill sea turtle (Eretmochelys imbricata), a critically endangered species, frontal view, South Ari Atoll, Maldives.

Three giant oceanic manta rays (Mobula birostris) circling at a cleaning station, South Ari Atoll, Maldives.

Hawksbill sea turtle (Eretmochelys imbricata), a critically endangered species, frontal view, South Ari Atoll, Maldives.

Head on view showing cerata on an aeolid nudibranch, Pteraeolidia ianthina, in Komodo National Park, Indonesia.

Ladybug amphipod, Cyproidea species, side view, taken at Cannibal Rock, Komodo National Park, Indonesia.

Diver looks on at sponges, coral and crinoids in a colorful Komodo seascape, taken at Cannibal Rock, Horseshoe Bay, Komodo National Park, Indonesia.

Diver looks on at sponges, pink soft corals and crinoids in a colorful Komodo seascape, Komodo National Park, Indonesia.

A trio of reef manta rays (Mobula alfredi) swimming above a reef top, Komodo National Park, Indonesia.

Diver looks on at sponges, soft corals and crinoids in a colorful Komodo seascape, Komodo National Park, Indonesia.

Close-up view of a green turtle (Chelonia mydas) resting on a reef top in Komodo National Park, Indonesia.