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A pair of manatees swimming in formation with the lead manatee in the crystal clear freshwater of the Fanning Springs inlet to the Suwannee River, Florida.

A school of Bluegill and Sunfish appear to swim toward the light from above over the Morrison Springs cavern dropoff at the state park in northwest Florida.

A young married couple celebrate their ten year anniversary by scuba diving in the clear freshwaters of Devil's Den Springs, a sinkhole in Williston, Florida, as the afternoon sun filters down into the cavern.

A scuba diver swims through an underwater field of tape grass leading away from the Blue Springs cave in Merritts Mill Pond in Marianna, Florida.

A scuba diver surfacing and looking up into the light as he ascends from the bottom of Devil's Den, a sinkhole in Williston, Florda.

A technical cave diver using a diver propulsion vehicle (DPV) to dive into the Blue Springs state park cave system near Marianna, Florida.

A Crocodilefish lies motionless on the sandy bottom at night in Papua New Guinea employing camouflauge while laying in wait for an unsuspecting fish.

A scuba diver ascends into the light emanating above through the sink hole into the clear freshwaters of Devil's Den cave near Williston, Florida.

A Peninsula Cooter turtle (Pseudemys peninsularis) looking up and positioned on the sandy bottom of the Morrison Springs cavern at 80 feet deep in the fresh clearwaters of the State Park near Red Bay, Florida.

An adult American Eel (Anguilla rostrata) prowls along the edge of the Morrison Springs cavern at 85 feet deep watching over the adolescent eels in the clear freshwaters of the state park near Red Bay, Florida.

A Blackside Hawkfish (Paracirrhites forsteri) swims over the red tentacles of a sea fan in the warm clear waters off the coast of Likuri Island, Fiji.

A Black Sea Turtle (Chelonia mydas agassizi) with a remora trying to attach, swims through a school of fish in the clear South Pacific ocean near Tavarua Island off the coast of Liti Levu, Fiji.

A Black Sea Turtle (Chelonia mydas agassizi) swims in the clear South Pacific ocean off the coast of Tavarua Island, Fiji in March 2012.

A Spotfin Lionfish flares it's dorsel spines and fins to display threat while laying on a colorful reef at night in the warm clear waters of Papua New Guinea. Lionfish float fearlessly around the reef as they are also one of the most venomous residents there.

Pink Anemonefish (Amphiprion perideraion) appear to be on lookout to protect their purple anemone home in the clear and warm ocean waters of Papua New Guinea.

A large spotted pufferfish swims in for a closer look at the photogrpher's camera off the coast of Key Largo, Florida.

A Gray Angelfish (Pomacanthus arcuatus) swims by diamond and fire corals in the shallow waters of the Atlantic Ocean off the coast of Key Largo, Florida.

A Blue Parrotfish (Scarus coeruleus) swimming up after munching on the coral reef below in the Atlantic Ocean off the coast of Key Largo, Florida.

A Neon Goby (Gobiosoma oceanops) takes a look outside its hole in the live boulder star coral (Montastraea annularis), Key Largo, Florida.

Coastal swimming pools near mountains at Porto da Cruz, Machico District, Madeira, Portugal, Atlantic, Europe

Coastal swimming pools near mountains at Porto da Cruz, Machico District, Madeira, Portugal, Atlantic, Europe

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

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

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.

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

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

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

Large school of dozens of scalloped hammerhead shark converging towards the surface, silhouetted against the blue water, Cocos Island.

Pair of pink skunk clownfish (Amphiprion perideraion) nestled in a round bright orange anemone, Manado, North Sulawesi, Indonesia.

An oceanic blacktip shark swims by with remora in tow, Aliwal Shoal, Umkomaas, KwaZulu-Natal, South Africa.

A pair of oceanic blacktip sharks with remora in tow pass each other by in a cloud of silvery fish, Aliwal Shoal, Umkomaas, KwaZulu-Natal, South Africa.