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Detail of a colonial tunicate growing on a coral reef in Komodo National Park, Indonesia.

Detail of a reef-building coral colony, Favia sp., growing on a healthy reef in Komodo National Park, Indonesia.

A beautiful coral reef thrives in shallow water in Indonesia's Banda Sea.

Detail of a reef-building coral colony growing on a healthy reef in Komodo National Park, Indonesia.

A black-banded sea krait, Laticauda semifasciata, swims over beautiful corals off the remote island of Manuk in the Banda Sea, Indonesia. This volcanic island is known as the island of the snakes.

A healthy and beautiful coral reef thrives in shallow water in Raja Ampat, Indonesia.

A greater blue-ring octopus, Hapalochlaena lunulata, crawls across a coral reef in Komodo National Park, Indonesia. There are several blue-ring octopus species and all of them are extremely venomous.

A beautiful coral reef thrives in shallow water in Indonesia's Banda Sea.

A healthy coral reef thrives in Komodo National Park, Indonesia.

A healthy and beautiful coral reef thrives in shallow water in Raja Ampat, Indonesia.

A beautiful coral reef thrives in shallow water in Indonesia's Banda Sea. This part of eastern Indonesia is home to part of the world's greatest marine biodiversity.

A healthy coral reef thrives in Komodo National Park, Indonesia.

A beautiful coral reef thrives in shallow water in Indonesia's Banda Sea. This part of eastern Indonesia is home to part of the world's greatest marine biodiversity.

A scorpionfish sits on a reef with a big frown, Red Sea, Egypt.

A pod of four dolphins swim playfully near a popular coral reef in the Red Sea.

The ocean is beautiful just under the surface near the desolate desert of Egypt.

Schooling fish in vibrant yellow hover over a coral reef in Raja Ampat, Indonesia.

A lionfish hovers over a coral reef as the sun sets, Raja Ampat, Indonesia.

A pair of cuttlefish mating over a coral reef, Raja Ampat, Indonesia.

A hawksbill turtle rests on a coral reef, Raja Ampat, Indonesia.

A school of anthias darts around a coral reef, Anilao, Philippines.

A school of yellow snapper hovers close to a coral reef, Maldives.

A coral bommie full of life, Maldives.

A lionfish poses on a coral reef, Red Sea.

A coral bommie full of reef fish and healthy corals, Red Sea.

A large Napoleon wrasse swimming over a coral reef, Red Sea.

A titan triggerfish hovers in a cleaning station, Red Sea.

Just beneath the surface of the Red Sea lies a beautiful hard coral garden.

A coral bommie in the Red Sea at Yolanda Reef is full of anthias fish.

Hawksbille sea turtle swimming across a reef in St. Croix, U.S. Virgina Islands.

Crinoid in Raja Ampat, Indonesia.

Underwater profusion of hard plate corals at Pulau Setaih Island, Natuna Archipelago, Indonesia, Southeast Asia, Asia

Snorkeler in underwater profusion of hard plate corals at Pulau Setaih Island, Natuna Archipelago, Indonesia, Southeast Asia, Asia

Underwater clownfish in anemone at Pulau Setaih Island, Natuna Archipelago, Indonesia, Southeast Asia, Asia

Half above and half below view of coral reef at Pulau Setaih Island, Natuna Archipelago, Indonesia, Southeast Asia, Asia

Snorkeler in underwater profusion of hard plate corals at Pulau Setaih Island, Natuna Archipelago, Indonesia, Southeast Asia, Asia

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

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

A bed of Sea Anemones and occasional hard corals, on a coral reef in Gaafu Dhaalu atoll, Maldives

Goniopora species hard coral, on a coral reef in Gaafu Dhaalu atoll, Maldives

A Crown-of-Thorns starfish (Acanthaster planci) on a badly damaged section of a coral reef in Gaaful Dhaalu atoll, in the faer south of the Maldives.

A Ctenocella species octocoral sea fan, surrounded by an assortment of hard corals, on a coral reef in Gaafu Dhaalu atoll, Maldives

Two-Spot Banded Snappers (Lutjanus biguttatus) on a coral reef in Gaafu Dhaalu atoll, Maldives

A growth of Acropora species, and one Goniastrea species (centre) scleractinic hard corals, on a coral reef in Gaafu Dhaalu atoll, Maldives

A 'forest' of Staghorn (Acropora species) hard corals, on a coral reef in Gaafu Dhaalu atoll, Maldives

A mixture of scleractinic hard corals on a coral reef in Gaafu Dhaalu atoll, Maldives

A mixture of Acropora species scleractinic hard corals, growing on a coral reef in Gaafu Dhaalu atoll, Maldives

A mix of hard corals, with a Pocillopora species coral in the centre, growing on a coral reef in Gaafu Dhaalu atoll, Maldives

A mix of Acropora species scleractinic hard corals growing on a coral reef in Gaafu Dhaalu atoll, Maldives

Heteractis species sea anemone guarded by Clownfish (Amphiprion species) on a coral reef in Gaafu Dhaalu atoll, Maldives

Driftwood on white sand beach at beautiful Mahoro Island with Masare and Pahepa Islands beyond, Mahoro, Siau, Sangihe Archipelago, North Sulawesi, Indonesia, Southeast Asia, Asia

Aerial of Goa island near the Island of Mozambique, Mozambique, Africa

Adult green sea turtle (Chelonia mydas agassizii) underwater off the west side of Isabela, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Adult green sea turtles (Chelonia mydas agassizii) underwater off the west side of Isabela, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Goldentail moray eel (Gymnothorax miliaris), in coral reef, Curacao.

Chain moray eel (Echidna catenata), in coral reef, Curacao.

A hawksbill sea turtle (Eretmochelys imbricata) feeds on sponge and an angelfish follows for scraps in Cozumel, Mexico.

A colorful reef scene with sunburst at Cozumel, Mexico.

World champion free diver and his team in training shot from inside a sunken barge 90 feet below in Bimini, Bahamas.

Diver and boat above black coral bushes in French Cay, Turks and Caicos.

A diver approaches a beautiful gorgonian sea fan, Cayman Islands.

Hawksbill sea turtle and gray angelfish by coral reef, USS Kittiwake, Grand Cayman.

Hawksbill sea turtle eating, Castle Wall, Grand Cayman.

Sea fan on the colorful reefs of Komodo, Indonesia.

Soft corals in the colorful reefs of the Banda Sea, Indonesia.

Colorful reef with fishes and sun burst in Komodo, Indonesia.

Soft coral in the reef at Komodo, Indonesia.

Free diver exploring the shallow reefs of the Banda Sea, Indonesia.

Soft coral in the reef at Komodo, Indonesia.

A Sheepshead looks on as a pair of Blue Angelfish appear to be confused on which direction to go but each are feeding on different parts of coral and algae covered jetty rocks at St. Andrew Bay channel wall in Panama City Beach, Florida.

Pink anemonefish (Amphiprion perideraion) guard their anemone on a coral reef in the South Pacific ocean near Tavarua Island off the coast of Veti Levu, Fiji.

Golden Damselfish (Amblyglyphidodon aureus) and other schooling fish swim around the coral head topped with Elkhorn Coral in the South Pacific ocean near Tavarua Island offshore from Liti Levu, Fiji.

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 Butterflyfish swims up along a coral reef in the warm and clear ocean waters of Papua New Guinea.

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.

A Blue Spotted Lagoon Fantail Ray (Taeniura lymma) peeking out from under a coral reef ledge, Papua New Guinea.

Close-up of a bicolor damselfish (Stegastes partitus) as it swims up from the coral reef off the coast of Key Largo, Florida.

A large Southern Stingray (Dasyatis americana), lays motionless covered in sand but ready to fly away with wing tips slightly elevated above the sand, alongside a coral reef in the Atlantic Ocean off the coast of Key Largo, Florida.

A Spotted Trunkfish (Lactophrys bilcaudalis) swims over an algae covered coral reef in the Atlantic Ocean off the coast of Key Largo, Florida.

A Spotted Moray Eel (Gymnothorax moringa) displays an open mouth as it protrudes it's head just outside a hole in a coral reef in the Atlantic Ocean off the coast of Key Largo, Florida.

A Spotfin Butterflyfish (Chaetodon ocellatus) feeding off the coral reef in the Atlantic Ocean off the coast of Key Largo, Florida.

A Porkfish (Anisotremus virginicus) swims by sea plumes out from under a coral reef ledge in the Atlantic Ocean off the coast of Key Largo, Florida.

A French Angelfish (Pomacanthus paru) swims up close to a Blue Striped Grunt (Haemulon sciurus) under a coral reef ledge in the Atlantic Ocean off the coast of Key Largo, Florida.

A Rainbow Parrotfish (Scarus guacamaia) pokes it's head out from a hole in the coral reef in the Atlantic Ocean 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 Blue Chromis (Chromis cyanea) swims into the current to maintain station over a colorful reef in the Atlantic Ocean off the coast of Key Largo, Florida.