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An Asian moon jellyfish, Aurelia coerulea, underwater on the island of Misool, Raja Ampat, on Papua, Indonesia

A family of Ocellaris anemonefish, Amphiprion ocellaris, underwater on the island of Misool, Raja Ampat, on Papua, Indonesia

Adult leopard seal (Hydrurga leptonyx) inspecting the camera above and below water at Damoy Point, Antarctica, Polar Regions

Above and below view of glacial ice near Wiencke Island, Neumayer Channel, Antarctica, Polar Regions

A large school of convict tang (Acanthurus triostegus) on the only living reef in the Sea of Cortez, Cabo Pulmo, Baja California Sur, Mexico, North America

Whale shark (Rhincodon typus), underwater with snorkelers off El Mogote, near La Paz, Baja California Sur, Mexico, North America

Bangka (boat) over coral, Chindonan Island, Calamian Islands, Coron, Palawan, Philippines, Southeast Asia, Asia

Whale shark (Rhincodon typus), filter feeding underwater off El Mogote, near La Paz, Baja California Sur, Mexico, North America

A curious male leopard seal (Hydrurga leptonyx), underwater at Monroe Island, South Orkney Islands, Antarctica, Polar Regions

Clown Anemonefish, Indonesia.

Female Great White Shark, Guadalupe Island, Mexico.

A small pod of pack Ice type B killer whales (Orcinus orca), just after making a Weddell seal kill in the Lemaire Channel, Antarctica, Polar Regions

A West Indian starfish (Oreaster reticulatus) crawls slowly across a sand and seagrass seafloor in Turneffe Atoll, Belize. This part of Central America is well known for its clear waters and beautiful coral reefs.

Detail of a colorful giant clam (Tridacna squamosa) growing on a reef near Alor in the Lesser Sunda Islands of Indonesia. This remote tropical region is home to extraordinary marine biodiversity. near Alor in the Lesser Sunda Islands of Indonesia.

A beautiful coral colony (Heliopora sp.) grows in Komodo National Park, Indonesia.

A white-spotted jellyfish (Phyllorhiza punctata) drifts in a strong current in the Lesser Sunda Islands of Indonesia.

A blue line grouper (Cephalopholis formosa) swims on a reef in the Lesser Sunda Islands of Indonesia.

Colorful tunicates, sponges, hydroids, and other invertebrates grow on a reef in Raja Ampat, Indonesia.

A colorful bouquet of tunicates grows on the seafloor of Lembeh Strait, Indonesia.

Detail of the tentacles of a tube anemone growing on a coral reef near Alor in Indonesia.

A beautiful coral reef thrives among the remote, tropical islands of Raja Ampat, Indonesia.

An ornate ghost pipefish, Solenostomus paradoxus, hovers near a hydroid on a reef in Raja Ampat, Indonesia.

A beautiful coral reef grows in a remote part of Raja Ampat, Indonesia.

A beautiful coral reef thrives in Komodo National Park, Indonesia. This tropical area in the Lesser Sunda Islands is known for both its amazing marine biodiversity as well its infamous dragons.

A beautiful coral reef thrives amid the tropical islands of Raja Ampat, Indonesia.

A black manta ray, Mobula alfredi, visits a cleaning station on a reef in Komodo National Park, Indonesia.

Anemone fish outside their closed anemone home.

A stargazer hides under the sand waiting to ambush its prey, Anilao, Philippines.

Pacific octopus off the coast of California.

A crocodile stalking its prey, Caribbean Sea, Mexico.

Crocodile under water, Caribbean Sea, Mexico.

Great White Shark at Guadalupe Island, Mexico.

Adult Peale's Dolphin (Lagenorhynchus australis), bow-riding near New Island in the Falkland Islands, South America

Young adult bull southern elephant seal (Mirounga leonina) close up while swimming in glacier run off, South Georgia Island, Polar Regions

Snorkelling at Glass Beach, Ireland Island South, Somerset, Bermuda, Atlantic, North America

Glacial iceberg detail from ice calved off the LeConte Glacier, Southeast Alaska, Pacific Ocean, United States of America, North America

A large pod of Gerlache Strait type B killer whales (Orcinus orca), traveling and socializing in Gerlache Strait, Antarctica, Polar Regions

A young killer whale (Orcinus orca) surfacing in Glacier Bay National Park, Southeast Alaska, United States of America, Pacific Ocean, North America

A view of a nuclear powered submarine in the industrial and militarized Russian seaport city of Murmansk, Murmansk Oblast, Russia, Arctic, Europe

Curious crabeater seals (Lobodon carcinophaga), swimming near iceberg at Booth Island near the Antarctic Peninsula, Polar Regions

Longarm octopus crawls along the seafloor of Blue Heron Bridge, West Palm Beach, Florida.

Manatee with calf in Crystal River, Florida.

Whale shark in Isla Mujeres, Mexico.

Squirrelfish in St. Croix, U.S. Virgin Islands.

Extreme close-up of a lizardfish eyeball, Australia.

Guadalupe fur seals (Arctocephalus townsendi), underwater on Las Animas Island, Baja California Sur, Sea of Cortez, Mexico, North America

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

Galapagos penguin (Spheniscus mendiculus) feeding underwater on small baitfish in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Young Galapagos sea lion (Zalophus wollebaeki) at play underwater in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Young Galapagos sea lions (Zalophus wollebaeki) at play underwater in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Antarctic fur seal pups (Arctocephalus gazella) playing in the kelp on Prion Island in the Bay of Isles on South Georgia, Polar Regions

Leucistic caused by lack of melanin, or blond Antarctic fur seal pup (Arctocephalus gazella) on South Georgia, Polar Regions

Gentoo penguin (Pygoscelis papua) adult with chicks at breeding colony on Booth Island, Antarctica, Southern Ocean, Polar Regions

Guadalupe fur seal (Arctocephalus townsendi), underwater on Las Animas Island, Baja California Sur, Sea of Cortez, Mexico, North America

Haenyeo women, famous for diving into their eighties and holding their breath for up to two minutes, free-diving for seafood and crustaceans, Jeju Island, South Korea, Asia

Galapagos sea lions (Zalophus wollebaeki) hauled out on the beach in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Galapagos sea lion (Zalophus wollebaeki) underwater in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Aquarium of Genoa, Liguria, Italy, Europe

Female southern elephant seal (Mirounga leonina) with newborn pup on the beach in Stromness Bay, South Georgia Island

American flag on a sunken ship in Key Largo, Florida.

Close-up view of a goldentail moray, Curacao.

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

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.

Snorkeler exploring heart-shaped reef in Banda Sea, Indonesia.

Colorful reef with fishes and sun burst in 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.

A Crown Jellyfish (Netrostoma setouchina) gently floating through South Pacific ocean waters off the coast of Tavarua Island, Fiji.

Close-up of a bicolor damselfish (Stegastes partitus) as it swims up from the coral reef 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.