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Clownfish (Amphiprion species) guarding their sea anemone home; on a coral reef in Gaafu Dhaalu atoll, Maldives
Goniopora species hard coral, on a coral reef in Gaafu Dhaalu atoll, Maldives
A shoal of tiny fish swimming over a coral reef in the Gaafu Dhaalu atoll, Maldives
A mixture of Acropora species scleractinic hard corals, on a coral reef in Gaafu Dhaalu atoll, Maldives
A Ctenocella species octocoral sea fan, surrounded by an assortment of hard corals, on a coral reef in Gaafu Dhaalu atoll, Maldives
A mixture of Acropora species scleractinic hard corals, on a coral reef in Gaafu Dhaalu atoll, Maldives
A huge Echinogorgia species sea fan, more than two metres across, on a coral reef in Gaafu Dhaalu atoll, Maldives
Staghorn scleractinic hard corals (Acropora species), 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
Mushroon Leather Coral (Sarcophyton species), a soft coral, growing 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 '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 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 Acropora species scleractinic hard corals, growing on a coral reef in Gaafu Dhaalu atoll, Maldives
Acropora species 'plate' corals, growing 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 mixture of Acropora species scleractinic hard corals, 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
A mix of Acropora species scleractinic hard corals growing on a coral reef in Gaafu Dhaalu atoll, Maldives
Adult fin whale (Balaenoptera physalus) surfacing in the rich waters off the continental shelf near South Georgia, Polar Regions
Adult Commerson's dolphin (Cephalorhynchus commersonii), surfacing in Stanley Harbor in the Falkland Islands, South America
Cygnet with head underwater, fishing near a rowboat in Thorpness boating lake, Aldeburgh, Suffolk, United Kingdom
Killer whale female calf (Orcinus orca), breaching at sunset off Isla San Jose, Baja California Sur, Sea of Cortez, Mexico, North America
Adult Weddell seal (Leptonychotes weddellii) hauled out on ice near the Antarctic Peninsula, Southern Ocean, Polar Regions
An adult bull among a pod of about 20 killer whales (Orcinus orca) in Antarctic Sound near the Antarctic Peninsula, Polar Regions
Aerial view of fishing boats, Mui Ne, Binh Thuan Province, Vietnam
Guadalupe fur seal (Arctocephalus townsendi), underwater on Las Animas Island, Baja California Sur, Sea of Cortez, Mexico, North America
An argonaut (Genus Argonauta), a group of pelagic octopuses. Baja California, Sea of Cortez, Mexico, North America
Adult fin whale (Balaenoptera physalus), dorsal fin detail surfacing off Newport Beach, California, United States of America, North America
By-the-wind sailors (Velella velella), floating by the hundreds on the surface of the sea outside Newport Beach, California, United States of America, North America
Aquarium of San Sebastian, Bay of Biscay, province of Gipuzkoa, Basque Country, Spain, Europe
Adult California gray whale (Eschrictius robustus), near boat in San Ignacio Lagoon, Baja California, Mexico, North America
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
Adult green sea turtles (Chelonia mydas agassizii) underwater off the west side of Isabela, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America
Sally lightfoot crab (Grapsus grapsus) in the littoral of the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
Galapagos sea lions (Zalophus wollebaeki) hauled out on the beach in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America
Juvenile humpback whale (Megaptera novaeangliae) breaching near the Antarctic Peninsula, Antarctica, Polar Regions
A small pod of Type B killer whales (Orcinus nanus) just outside Duse Bay in the Weddell Sea, Antarctica, Polar Regions
Antarctic fur seal bull (Arctocephalus gazella) on South Georgia, Southern Ocean, Polar Regions
Patterns in the kelp at low tide on South Georgia Island, Southern Ocean
Female southern elephant seal (Mirounga leonina) with newborn pup on the beach in Stromness Bay, South Georgia Island
Purple stove-pipe sponge (Aplysina archeri), with boat in background, Curacao.
A diver shines a light in on a cavern filled with glassy sweepers (Pempheris schomburgkii) at Molasses Reef in Key Largo, Florida.
A colorful reef scene with sunburst at Cozumel, Mexico.
Diver and boat above black coral bushes in French Cay, Turks and Caicos.
A diver approaches a beautiful gorgonian sea fan, Cayman Islands.
School of silversides form shapes in the tunnels at Eden Rock, Grand Cayman.
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 technical cave diver using a diver propulsion vehicle (DPV) to dive into the Blue Springs state park cave system near Marianna, 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.
Plate coral (Acropora hyacinthus) Beqa Lagoon, Fiji.
Schooling anthias fish and healthy corals of Beqa Lagoon, Fiji.
Schooling anthias fish and healthy corals of Beqa Lagoon, Fiji.
Hawksbill turtle glides over the pristine reefs in Fiji.
A school of orange basslets (Pseudanthias squamipinnis) on a healthy Fijian reef full of hard and soft corals, Fiji.
Fijian dive guide feeds a school of Scissortail Sergeant Major fish, Fiji.
Teardrop Butterflyfish swim within a protective coral arch, Fiji.
A school of orange basslets (Pseudanthias squamipinnis) on a healthy coral reef, Fiji.
A school of orange basslets (Pseudanthias squamipinnis) on a healthy coral reef, Fiji.
Sharptaiil Eel searchs the reef for food, Bonaire, Caribbean Netherlands.
Scuba diver swims by some large sponges off the coast of Bonaire, Caribbean Netherlands.
Swarms of small baitfish swim above a large sea anenome, Fiji.
Sharknose Goby sits on some hard coral, 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 swimming underwater amongst sea sponges, Bonaire, Caribbean Netherlands.
Scuba diver swimming underwater amongst sea sponges, Bonaire, Caribbean Netherlands.
Unknown gobie/ blenny found at 48 feet deep, Bonaire, Caribbean Netherlands.
Diver looks on at sponges, pink soft corals and crinoids in a colorful Komodo seascape, Komodo National Park, Indonesia.
Diver looks on at sponges, soft corals and crinoids in a colorful Komodo seascape, Komodo National Park, Indonesia.
Diver looks on at sponges, soft corals and crinoids in a colorful Komodo seascape, Indonesia.
Diver looks on at sponges, soft corals and crinoids in a colorful Komodo seascape, Indonesia.
December 3, 2012 - Colourful crater lakes of Kelimutu volcano, Flores Island, Indonesia. Tiwu Nua Muri Kofah (Lake of Young Men and Maidens) and Tiwu Ata Polo (Bewitched Lake). The two lakes are highly acidic due to underwater fumarole activity and are turqoise in colour.
December 3, 2012 - Colourful crater lakes of Kelimutu volcano, Flores Island, Indonesia. A crater wall separates Tiwu Nua Muri Koo Fai (Lake of Young Men and Maidens) and Tiwu Ata Polo (Bewitched Lake). The two lakes are highly acidic due to underwater fumarole activity and are turqoise in colour.
December 3, 2012 - Colourful crater lakes of Kelimutu volcano, Flores Island, Indonesia. Tiwu Nua Muri Koo Fai (Lake of Young Men and Maidens) and Tiwu Ata Polo (Bewitched Lake). The two lakes are highly acidic due to underwater fumarole activity and are turqoise in colour.
Diver enters the cavern system at Chac Mool cenote in the Riviera Maya area of Mexico's Yucatan Peninsula.
A cavern diver ascends into the light filtering into cenote system at Yucatan Peninsula, Mexico.
Two scuba divers in the Garden of Eden cavern part of the cenote system on the Yucatan Peninsula of Mexico.
Cenote diver enters Taj mahal cavern on Yucatan peninsula in Mexico.
A cavern diver enters the Taj Mahal cenote system on Mexico's Yucatan Peninsula.
Cavern divers enter cenote system in Mexico's Yucatan Peninsula.
Diver with large purple sea fan, Cariibean Sea.
Scuba diver in the Garden of Eden cavern part of the cenote system on the Yucatan Peninsula of Mexico.
Bigeye Trevally (Caranx sexfasciatus), schooling in Cabo Pulmo National Marine Park, Baja California Sur, Mexico, North America
Bigeye Trevally (Caranx sexfasciatus), schooling in Cabo Pulmo National Marine Park, Baja California Sur, Mexico, North America
Young adult bull southern elephant seal (Mirounga leonina) holding young pup's head underwater trying to kill it, South Georgia Island, Southern Ocean
A small pod of killer whales (Orcinus orca) off the coast of South Georgia Island, Southern Ocean
Very remote Shag Rocks, near South Georgia Island in the Scotia Sea, South Atlantic Ocean
Very remote Shag Rocks, near South Georgia Island in the Scotia Sea, South Atlantic Ocean
On the island of pearls of Mikimoto (named after the inventor and developer of the pearl culture: Kokichi Mikimoto 1858-1954), women divers in traditional clothing. Toba, Ise-Shima National Park, Japan
On the island of pearls of Mikimoto (named after the inventor and developer of the pearl culture: Kokichi Mikimoto 1858-1954), women divers in traditional clothing. Toba, Ise-Shima National Park, Japan
Eared grebes (Podiceps nigricollis), in Puerto Refugio, Angel de la Guarda Island, Baja California, Sea of Cortez, Mexico, North America
Coral Reefs Monument at the waterfront of San Miguel de Cozumel, Cozumel Island, Quintana Roo State, Mexico
Coral Reefs Monument at the waterfront of San Miguel de Cozumel, Cozumel Island, Quintana Roo State, Mexico
Coral Reefs Monument at the waterfront of San Miguel de Cozumel, Cozumel Island, Quintana Roo State, Mexico
Coral Reefs Monument at the waterfront of San Miguel de Cozumel, Cozumel Island, Quintana Roo State, Mexico