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Green sea turtles (Chelonia mydas), gather at a cleaning station off West Maui, Hawaii, United States of America, Pacific, North America

Humpback whales (Megaptera novaeangliae), underwater off the coast of Hawaii, United States of America, Pacific, North America

Humpback whales (Megaptera novaeangliae), underwater off the coast of Hawaii, United States of America, Pacific, North America

Bigeye emperor (Monotaxis grandoculis), Maui, Hawaii, United States of America, Pacific, North America

The very capable teeth in the jaw of a stout moray (Gymnothorax eurostus), Hawaii, United States of America, Pacific, North America

A plumed scorpionfish (Scorpaena grandicornis), off Singer Island in Florida, United States of America, North America

A cleaner shrimp (Lysmata amboinensis) inspecting a honeycomb moray eel (Gymnothorax favageneus), Philippines, Southeast Asia, Asia

Almaco jack (Seriola rivoliana), in the pen at a fish farm off The Big Island, Hawaii, United States of America, Pacific, North America

A close-up of the mouth of a whitemouth moray eel (Gymnothorax meleagris), showing its needle sharp teeth, United States of America, North America

A humpback whale (Megaptera novaeangliae), tail slapping the surface of the Pacific Ocean off Hawaii, United States of America, Pacific, North America

Endangered Florida manatee (Trichechus manatus latirostris), at Three Sisters Spring in Crystal River, Florida, United States of America, North America

Green sea turtles (Chelonia mydas), an endangered species, Hawaii, United States of America, Pacific, North America

Humpback whale (Megaptera novaeangliae), underwater off the coast of Hawaii, United States of America, Pacific, North America

A Bleeker's parrotfish (Chlorurus bleekeri), surrounded by a mucus bubble it secretes for protection, Fiji, South Pacific, Pacific

Penguin on a beach with clear blue water and swimmers in the background at London Zoo, London, England, United Kingdom, Europe

The entrance to the the Aquatics Centre in the Olympic Park during the Gold Challenge event, London, England, United Kingdom, Europe

The entrance to the the Aquatics Centre in the Olympic Park during the Gold Challenge event, London, England, United Kingdom, Europe

The entrance to the the Aquatics Centre in the Olympic Park, London, England, United Kingdom, Europe

Nesting Black-browed Albatross (Thalassarche melanophris), New Island, Falkland Islands, British Overseas Territory, South America

Juvenile Wattled Jacana (Jacana jacana) walking on waterlilies leaves, Manu National Park, Peruvian Amazon, Peru, South America

Indian Cormorant (Indian shag) (Phalacrocorax fuscicollis) above water on trunk tree with opened wings, Poovar, Thiruvanthapurm, Kerala, India, Asia

Sunlight sparkles through a table coral (Acropora sp.) in Komodo National Park, Indonesia. This tropical region in Indonesia is known for its spectacular coral reefs and high marine biodiversity.

A lionfish (Pterois volitans) swims along the edge of a beautiful reef in Wakatobi National Park, Indonesia. This remote region is known for its incredible marine biodiversity and gorgeous reefs.

Crinoids cling to a large sponge on a healthy coral reef near the island of Sulawesi, Indonesia. This beautiful, tropical region is home to an incredible variety of marine life.

An unusual sea star (Linckia laevigata) clings to a diverse reef near the island of Bangka, Indonesia. This beautiful, tropical region is home to an incredible variety of marine life.

Young lily pads grow to the surface along the shallow edge of a freshwater lake in Cape Cod, Massachusetts. Vegetation, which provides habitat for fish, amphibians, and reptiles, grows wildly during summer months and then dies off during the fall and wint

Lily pads grow along the shallow edge of a freshwater lake in New England. Aquatic vegetation, which thrives during summer months, provides vital habitat for many fish, amphibians, and reptiles.

A sleek blue shark (Prionace glauca) cruises through the cold waters off Cape Cod, Massachusetts, in the Atlantic Ocean. These beautiful elasmobranchs are found throughout the world in both temperate and tropical seas and are a species listed as Near Thre

Colorful tunicates and soft corals grow on a reef in Wakatobi National Park, Indonesia. This remote region is known for its incredible marine biodiversity and gorgeous reefs.

A small red starfish clings to coralline algae in Wakatobi National Park, Indonesia. This remote region is known for its incredible marine biodiversity and gorgeous reefs.

Christmas tree worms (Spirobranchus giganteus) grow on a coral reef in Wakatobi National Park, Indonesia. This remote region is known for its incredible marine biodiversity and gorgeous reefs.

A pink anemonefish (Amphiprion perideraion) swims among the tentacles of its host anemone in Wakatobi National Park, Indonesia. This remote region is known for its incredible marine biodiversity and gorgeous reefs.

A translucent shrimp (Vir philippinensis) crawls on bubble coral in Wakatobi National Park, Indonesia. This remote region is known for its incredible marine biodiversity and gorgeous reefs.

A Papuan scorpionfish (Scorpaenopsis papuensis) lies on a reef in Raja Ampat, Indonesia. This remote, tropical region is home to extraordinary marine biodiversity.

Colorful lily pads grow along the shallow edge of a freshwater lake in New England. Aquatic vegetation, which thrives during summer months, provides vital habitat for many fish, amphibians, and reptiles.

Bright sunlight shines down on lily pads growing along the shallow edge of a freshwater lake in New England. Aquatic vegetation, which thrives during summer months, provides vital habitat for many fish, amphibians, and reptiles.

A colorful and healthy coral reef thrives in shallow water in Raja Ampat, Indonesia. This remote region is known as the heart of the Coral Triangle due to its extraordinary marine biodiversity.

A broadclub cuttlefish (Sepia latimanus) uses camouflage to blend into a shallow coral reef in Raja Ampat, Indonesia. This remote region is known as the heart of the Coral Triangle due to its extraordinary marine biodiversity.

Fast-growing staghorn coral fragments, Acropora sp., are being grown in hopes of replanting colonies in reef areas of the Caribbean Sea that have been damaged.

A cluster of colorful tunicates grow on a coral reef amid the remote, tropical islands of Raja Ampat, Indonesia.

A magnificent humpback whale, Megaptera novaeangliae, swims in the clear, blue waters of the Caribbean Sea.

Discarded plastic bags and other trash float above a shallow coral reef in Raja Ampat, Indonesia. Plastics have become a major pollution problem worldwide.

A school of lined sweetlips, Plectorhinchus lineatus, swim above a healthy coral reef in Raja Ampat, Indonesia.

An unidentified scorpionfish waits to ambush prey on a black sand slope 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 huge giant clam, Tridacna gigas, grows on a shallow coral reef amid the tropical islands of Raja Ampat, Indonesia.

A well-camouflaged tasselled wobbegong, Eucrossorhinus dasypogon, lies on the seafloor in Raja Ampat, Indonesia.

A huge whale shark, Rhincodon typus, swims in sunlit Indonesian waters. This massive yet harmless shark feeds on planktonic organisms and can sometimes be found swimming near fishing platforms due to the scent of fish.

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 tiny hard coral crab can be found burrowing in between the polyps of the coral, Anilao, Philippines.

A snail about the size of a coin generally lives under the sand but comes out at night to feed, Anilao, Philippines.

Antarctic tern (Sterna vittata), feeding in the Enterprise Islands, Antarctica, Southern Ocean, Polar Regions

Striated Heron (Butorides striata) perching on branch by Lake Sandoval, Tambopata National Reserve, Puerto Maldonado, Madre de Dios, Peru, South America

The clear turquoise waters of Cala Mariolu, Gulf of Orosei National Park, Santa Maria Navarrese, Baunei, Nuoro, Sardinia, Italy, Mediterranean, Europe

Aerial of a dugout canoe on the Congo River, Mbandaka, Equateur province, Democratic Republic of Congo, Africa

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

An adult bull killer whale (Orcinus orca) surfacing in Johnstone Strait, British Columbia, Canada, Pacific Ocean, North America

Adult snow petrel (Pagodroma nivea nivea), in flight near the Antarctic Peninsula, Antarctica, Southern Ocean, Polar Regions

A pod of killer whales (Orcinus orca) surfacing in Chatham Strait, Southeast Alaska, United States of America, Pacific Ocean, North America

Curious walrus (Odobenus rosmarus rosmarus) near Apollo Island in Franz Josef Land, Russia, Arctic Ocean, Eurasia