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

Adult male Galapagos marine iguana (Amblyrhynchus cristatus), underwater, Fernandina Island, Galapagos, Ecuador, South America

A young emperor penguin (Aptenodytes forsteri) hauled out on 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

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

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

A view of the Bertrab Glacier in Gold Harbour on the island of South Georgia, South Atlantic, Polar Regions

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

Humpback whales (Megaptera novaeangliae), swimming underwater on Ningaloo Reef, Western Australia, Australia, Pacific

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

Commercial whale watching boat Goddess Fantasy operating in Monterey Bay Marine Sanctuary, California, United States of America, North America

An adult snowflake moray eel (Echidna nebulosa), on the reef off Port Airboret, Raja Ampat, Indonesia, Southeast Asia

A school of jointed razorfish (Aeoliscus strigatus), in their usual head down formation, off Bangka Island, Indonesia, Southeast Asia, Asia

An Antarctic shag (Leucocarbo bransfieldensis), carries sea moss in the Antarctic Peninsula, Polar Regions

Christmas tree worms (Spirobranchus giganteus), in the shallow reefs off Bangka Island, Indonesia, Southeast Asia, Asia

An adult wandering albatrosss (Diomedea exulans) in flight in the Drake Passage, Argentina, South America

A Caribbean electric ray (Narcine bancroftii) lays on the sandy seafloor of Turneffe Atoll off the coast of Belize in the Caribbean Sea. This ray can generate strong electric discharges used to defend themselves or to stun prey.

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

Detail of the spiral tentacles arrangement of a feather duster worm (Bispira sp.) in Komodo National Park, Indonesia.

A large roughtail stingray, Dasyatis centroura, lays on the seagrass-covered seafloor of Turneffe Atoll off the coast of Belize. This reef is part of the massive Mesoamerican Reef System in the Caribbean Sea, the second largest barrier reef on Earth.

A Florida manatee, Trichechus manatus latirostris, rises to the surface of Crystal River, Florida. This endangered sirenian subspecies migrates to inland rivers during the winter where water temperatures are warmer than the ocean.

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

Adult humpback whale (Megaptera novaeangliae) flukes-up dive in Inian Pass, Southeast Alaska, Pacific Ocean, United States of America, North 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

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

Striated caracara (Phalcoboenus australis) feather detail, on Carcass Island in the Falkland Islands, South Atlantic Ocean, South America

Adult California gray whales (Eschrictius robustus), spy-hopping in San Ignacio Lagoon, Baja California, Mexico, North America

Guest from the Lindblad Expedition ship National Geographic Endeavour in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Juvenile Galapagos brown pelican (Pelecanus occidentalis urinator), smallest species of pelican worldwide, feeding in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

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

King penguin (Aptenodytes patagonicus) breeding and nesting colony on South Georgia Island, Southern Ocean, Polar Regions

King penguin (Aptenodytes patagonicus) breeding and nesting colony on South Georgia Island, Southern Ocean, Polar Regions

Bigeye Trevally (Caranx sexfasciatus), schooling in Cabo Pulmo National Marine Park, Baja California Sur, Mexico, North America

American oystercatcher (Haematopus palliatus), on Isla Espiritu Santo, Baja California Sur, Sea of Cortez, Mexico, North America

Injured juvenile yellow-footed gull (Larus livens), on Isla Coronado, Baja California Sur, Sea of Cortez, Mexico, North America

Double-crested cormorant (Nannopterum auritum), taking flight, Concepcion Bay, Baja California Sur, Sea of Cortez, Mexico, North America

Killer whale pod (Orcinus orca), off Punta Colorada, Isla San Jose, Baja California Sur, Mexico, North America

California sea lion (Zalophus californianus), porpoising in the water in Puerto Refugio, Baja California, Sea of Cortez, Mexico, North America

A long-beaked common dolphin (Delphinus capensis), surfacing off Gorda Banks, Baja California Sur, Mexico, North America

A long-beaked common dolphin (Delphinus capensis), surfacing off Gorda Banks, Baja California Sur, Mexico, North America

Adult brown pelicans (Pelecanus occidentalis), on a small islet near Isla Salsipuedes, Baja California, Mexico, North America

Adult brown pelicans (Pelecanus occidentalis), plunge diving for fish, Isla Carmen, Baja California Sur, Mexico, North America

Adult Peale's Dolphin (Lagenorhynchus australis) bow-riding Zodiacs on New Island in the Falkland Islands

A curious adult cape petrel (Daption capense), Lindblad Cove, Trinity Peninsula, Antarctica, Polar Regions

Type Big B killer whales (Orcinus orca), pinniped specialist swimming near the Yalour Islands, Antarctica, Polar Regions

Transient killer whale (Orcinus orca), power lunging, Monterey Bay National Marine Sanctuary, California, United States of America, North America

Kittiwakes sitting on a huge piece of glacier ice with an expedition boat in the background, Hornsund, Svalbard, Arctic, Norway, Scandinavia, Europe

An adult sea otter (Enhydra lutris) resting on its back in the harbor at Kodiak, Kodiak Island, Alaska, United States of America, North America

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

Adult humpback whale (Megaptera novaeangliae), tail-lobbing at Los Cabos, Baja California Sur, Mexico, North America

King penguin (Aptenodytes patagonicus) chicks called Okum Boys at Gold Harbor, South Georgia, Polar Regions

Adult wandering albatross (Diomedea exulans) in flight near Prion Island, Bay of Isles, South Georgia, Polar Regions

Adult bottlenose dolphin (Tursiops truncatus), leaping to the sky, Isla San Pedro Martir, Baja California, Mexico, North America

Adult Heermann's gull (Larus heermanni), in flight near Isla Rasa, Baja California, Mexico, North America

Adult Munk's pygmy devil ray (Mobula munkiana), leaping into the air, Isla San Jose, Baja California Sur, Mexico, North America

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

Adult bearded seal (Erignathus barbatus), on ice in Makinson Inlet, Ellesmere Island, Nunavut, Canada, North America

Glaucous gull (Larus hyperboreus), in flight in Makinson Inlet, Ellesmere Island, Nunavut, Canada, North America

A mother polar bear (Ursus maritimus), with two cubs of the year foraging for food at Cape Brewster, Greenland, Polar Regions

Adult humpback whales (Megaptera novaeangliae), surfacing in Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Tufted puffin (Fratercula cirrhata) taking flight at South Marble Island, Glacier Bay National Park, Alaska, United States of America, North America

Crowds of Guillemots (Uria aalge), on Staple Island, in the Farne Islands, Northumberland, northeast England, United Kingdom, Europe

An adult Galapagos octopus (Octopus oculifer), underwater at North Seymour Island, Galapagos, Ecuador, South America

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

Adult fin whales (Balaenoptera physalus), feeding on krill near Coronation Island, South Orkney Islands, Antarctica, Polar Regions

Penguins walk across the glacier on Thule Island, a volcanic island in the South Sandwich Islands, South Atlantic, Polar Regions

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

Adult male killer whale (Orcinus orca), surfacing at sunset on Ningaloo Reef, Western Australia, Australia, Pacific

Humpback whale (Megaptera novaeangliae), adult underwater on Ningaloo Reef, Western Australia, Australia, Pacific

Humpback whale (Megaptera novaeangliae), adult breaching on Ningaloo Reef, Western Australia, Australia, Pacific

Giant Madagascar Day Gecko (Phelsuma grandis) hanging from a banana tree, Nosy Be, North West Madagascar, Indian Ocean, Africa

Adult polar bear (Ursus maritimus) in 10/10ths pack ice in McClintock Channel, Northwest Passage, Nunavut, Canada, North America

An adult Galapagos bullhead shark (Heterodontus quoyi), Buccaneer Cove, Santiago Island, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Massive numbers of Cormorants on the sand dunes along the Atlantic coast, Namibe (Namib) desert, Iona National Park, Namibe, Angola, Africa

California gray whale calf (Eschrictius robustus), with excited tourists in San Ignacio Lagoon, Baja California, Mexico, North America