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Green sea turtle (Chelonia mydas), with snorkeler near Caye Caulker, inside the Mesoamerican Barrier Reef, Belize

A myriad of fish and coral underwater at Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

A myriad of fish and coral underwater at Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

A myriad of fish and coral underwater at Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

A myriad of fish and coral underwater at Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

A myriad of fish and coral underwater at Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

A myriad of fish and coral underwater at Hol Chan Marine Preserve, inside the Mesoamerican Barrier Reef, Belize

Adult sea otter (Enhydra lutris kenyoni) mother and pup in Inian Pass, Southeastern Alaska, United States of America

Adult sea otter (Enhydra lutris kenyoni) in kelp bed in Inian Pass, Southeastern Alaska, United States of America

Adult sea otter (Enhydra lutris kenyoni) in kelp bed in Inian Pass, Southeastern Alaska, United States of America

Adult sea otter (Enhydra lutris kenyoni) in kelp bed in Inian Pass, Southeastern Alaska, United States of America

Adult sea otter (Enhydra lutris kenyoni) in kelp bed in Inian Pass, Southeastern Alaska, United States of America

Adult humpback whale (Megaptera novaeangliae) breaching along the west side of Chatham Strait in Alaska, United States of America

Adult humpback whale (Megaptera novaeangliae) breaching along the west side of Chatham Strait in Alaska, United States of America

Adult humpback whales (Megaptera novaeangliae) co-operatively bubble-net feeding in Southeast Alaska, United States of America

Adult humpback whales (Megaptera novaeangliae) co-operatively bubble-net feeding in Southeast Alaska, United States of America

Adult humpback whales (Megaptera novaeangliae) co-operatively bubble-net feeding in Southeast Alaska, United States of America

Gathering of at least two resident pods of killer whales (Orcinus orca) encountered near sunset, Johnstone Strait, British Columbia, Canada

A juvenile killer whale (Orcinus orca) encountered off West Craycroft Island in Blackfish Sound, British Columbia, Canada

Juvenile western gulls (Larus occidentalis) feeding on tuna crabs, Isla Magdalena, Baja California Sur, Mexico, North America

Gray seals (grey seals) (Halichoerus grypus) hauled out on the shoreline on Mainland Island, Shetland Isles, Scotland, United Kingdom, Europe

Profusion of hard and soft corals and reef fish underwater on Mengiatan Island, Komodo National Park, Flores Sea, Indonesia, Southeast Asia, Asia

Sea otters (Enhyrda lutris), endangered species, and Mount Edgecumbe, extinct volcano, Sitka Sound, Sitka, Southeast Alaska, United States of America, North America

Galapagos sea lion (Zalophus wollebaeki), pup in Puerto Egas, Santiago Island, Galapagos, Ecuador, South America

Elegug Stacks, occupied by a colony of Guillemots, Pembrokeshire Coast National Park, Wales, United Kingdom, Europe

Transient killer whale (Orcinus orca) breaching in the Monterey Bay National Marine Sanctuary, California, United States of America, North America

Curious California sea lions (Zalophus californianus), underwater at Los Islotes, Baja California Sur, Mexico, North America

A huge King Penguin (Aptenodytes patagonicus) breeding colony on the beaches of Gold Harbor, South Georgia, Polar Regions

A pod of Type A killer whales (Orcinus orca), surfacing off the northwest coast of South Georgia, Polar Regions

Southern elephant seals (Mirounga leoninar), resting on the beach with penguins, at Gold Harbor, South Georgia, Polar Regions

California gray whale calf (Eschrichtius robustus) underwater, San Ignacio Lagoon, Baja California Sur, Mexico, North America

California gray whale calf (Eschrichtius robustus), with human hands, San Ignacio Lagoon, Baja California Sur, Mexico, North America

Whale watcher with California gray whale (Eschrichtius robustus), San Ignacio Lagoon, Baja California Sur, Mexico, North America

Whale watcher with California gray whale (Eschrichtius robustus), San Ignacio Lagoon, Baja California Sur, Mexico, North America

Whale watcher with California gray whale (Eschrichtius robustus), San Ignacio Lagoon, Baja California Sur, Mexico, North America

Whale watchers with California gray whale (Eschrichtius robustus), San Ignacio Lagoon, Baja California Sur, Mexico, North America

Adult long-beaked common dolphins (Delphinus capensis) at sunrise off Isla Ildefonso, Baja California, Mexico, North America

Brown pelicans (Pelecanus occidentalis), at a sardine processing plant, Puerto San Carlos, Baja California Sur, Mexico, North America

Antarctic shags (Leucocarbo bransfieldensis), taking flight with nesting material at Port Lockroy, Antarctica, Polar Regions

A pair of juvenile Galapagos hawks (Buteo galapagoensis), Rabida Island, Galapagos, Ecuador, South America

Adelie penguins (Pygoscelis adeliae), marching on the beach at Brown Bluff, Antarctic Sound, Antarctica, Polar Regions

The face of a molting southern elephant seal (Mirounga leonina), on the beach on Snow Island, Antarctica, Polar Regions

A pair of emperor penguins (Aptenodytes forsteri), crossing the ice near Snow Hill Island, Weddell Sea, Antarctica, Polar Regions

An adult humpback whale (Megaptera novaeangliae), flukes up dive amongst ice at Brabant Island, Antarctica, Polar Regions

Antarctic fur seal pups (Arctocephalus gazella), playing underwater in Stromness Harbor, South Georgia, South Atlantic, Polar Regions

King penguin (Aptenodytes patagonicus), breeding colony at Gold Harbour, South Georgia, South Atlantic, Polar Regions

Adult imperial shag (Leucocarbo atriceps), feeding a chick at a breeding colony on Saunders Island, Falklands, South America

Gentoo penguin (Pygoscelis papua), adults coming back from feeding at sea on the beach at New Island, Falklands, South America

Adult humpback whale (Megaptera novaeangliae), flukes up dive on Ningaloo Reef, Western Australia, Australia, Pacific

An adult bowhead whale (Balaena mysticetus), flukes-up dive off Somerset Island, Nunavut, Canada, North America

Adult green sea turtle (Chelonia mydas), feeding on algae near Fernandina Island, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Rare New Zealand sea lions at Hoopers Inlet on Otago Peninsula, Otaago, South Island, New Zealand, Pacific

Seabirds Tropicbirds, Pajaros Islet (Swan's Cay off the coast of Boca del Drago on Colon Island, Bocas del Toro Archipelago, Republic of Panama, Central America

An adult peacock mantis (Odontodactylus scyllarus), in the Equator Islands, Raja Ampat, Indonesia, Southeast Asia, Asia

An adult northern giant petrel (Macronectes halli) in flight in the Drake Passage, Argentina, South America

Emperor penguin (Aptenodytes forsteri) and chicks, Snow Hill Island, Weddell Sea, Antarctica, Polar Regions

Steller sea lion (Eumetopias jubatus), hauled out on South Marble Island, Glacier Bay National Park, Southeast Alaska, United States of America, North America

A mother sea otter (Enhydra lutris) eating a Dungeness crab with her pup in the Inian Islands, Southeast Alaska, United States of America, North America

Young humpback whale (Megaptera novaeangliae), breaching in Frederick Sound, Southeast Alaska, United States of America, North America

Adult cape petrel (Daption capense) flying in gale force winds in the Drake Passage, Antarctica, Polar Regions

Adult cape petrel (Daption capense) flying in gale force winds in the Drake Passage, Antarctica, Polar Regions

View of seagull from ferry at sunset, Kavala, Dimos Kavalas, Eastern Macedonia and Thrace, Gulf of Thasos, Gulf of Kavala, Greece, Europe

Woman in bikini holding starfish against a green colored sea and blue sky, Bavaro Beach, Punta Cana, Dominican Republic, West Indies, Caribbean, Central America

An adult Brahminy kite (Haliastur indus), catching fish on Batu Hatrim, Raja Ampat, Indonesia, Southeast Asia, Asia

Corals grow on a shallow reef in Indonesia. This beautiful, tropical region is known for its spectacular reefs and high marine biodiversity.

A hairy frogfish (Antennarius striatus) uses its incredible camouflage to successfully capture prey in Lembeh Strait, Indonesia.

A tube anemone grows on a sandy seafloor in Komodo National Park, Indonesia. This tropical area in the western Pacific harbors an extraordinary array of marine organisms.

A large roughtail stingray (Dasyatis centroura) rests on the seafloor near Turneffe Atoll, Belize. This species is found throughout much of the Atlantic near reefs.

A yellow stingray (Urobatis jamaicensis) lays on the sandy seafloor of Turneffe Atoll in Belize. This small and beautiful elasmobranch ranges throughout the Caribbean Sea.

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

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

An unidentified moray eel (Gymnothorax sp.) swims over a sandy seafloor in Komodo National Park, Indonesia.

A snowflake moray eel (Echidna nebulosa) peeks out from a dark hole on a reef in Komodo National Park, Indonesia.

A beautiful coral reef grows near an island in the Banda Sea, Indonesia. This remote and historic region, known previously for the Spice Islands, harbors extraordinary marine biodiversity.

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

Creative motion blur image of adult king penguins (Aptenodytes patagonicus) returning to the sea on South Georgia, Polar Regions

Adult king penguins (Aptenodytes patagonicus) returning to sea from the nesting colony at Salisbury Plain, South Georgia, Polar Regions

Macaroni penguins (Eudyptes chrysolophus) scrambling up steep cliffs at Hercules Bay on South Georgia Island, Polar Regions

Views of the abandoned whaling station in Stromness Bay on South Georgia in the Southern Ocean, Polar Regions

African (black) oystercatcher (Haematopus moquini), De Hoop nature reserve, Western Cape, South Africa, Africa

Panoramic view across turquoise sea to Arbatax and Capo Bellavista, Santa Maria Navarrese, Baunei, Nuoro, Sardinia, Italy, Mediterranean, Europe

View of woodland and coastline near Chrysi Ammoudia, Thassos, Aegean Sea, Greek Islands, Greece, Europe

Adult sea otter (Enhydra lutris kenyoni) mother with her pup on her chest in Inian Pass, Southeastern Alaska, Pacific Ocean, United States of America, North America

View of olive trees and Golden Beach at Chrysi Ammoudia, Thassos, Aegean Sea, Greek Islands, Greece, Europe

Boojum tree (Fouquieria columnaris), just outside Bahia de los Angeles, Baja California, Sea of Cortez, Mexico, North America