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Short-finned pilot whale (Globicephala macrorhynchus), tail-lobbing off Isla San Marcos, Baja California Sur, Mexico, North America

Short-finned pilot whale (Globicephala macrorhynchus), underwater off Isla San Marcos, Baja California Sur, Mexico, North America

Adult sperm whale (Physeter macrocephalus) diving off Isla San Jose, Baja California Sur, Mexico, North America

Juvenile whale shark (Rhincodon typus), underwater near Los Islotes, Baja California Sur, Mexico, North America

Humpback whale (Megaptera novaeangliae), feeding at the surface, Alert Bay, Inside Passage, British Columbia, Canada, North America

Adult chinstrap penguins (Pygoscelis antarcticus), porpoising through the sea in Cooper Bay, South Georgia, Polar Regions

King penguin (Aptenodytes patagonicus) breeding colony at Salisbury Plain, South Georgia, Polar Regions

King penguin (Aptenodytes patagonicus) breeding colony at Salisbury Plain, South Georgia, Polar Regions

Sunrise on king penguin (Aptenodytes patagonicus) breeding colony at Gold Harbor, South Georgia, Polar Regions

Adult King penguin (Aptenodytes patagonicus) breeding colony at Gold Harbor, South Georgia, Polar Regions

King penguin (Aptenodytes patagonicus) adults establishing partners at breeding colony in Gold Harbor, South Georgia, Polar Regions

Young southern elephant seal bulls (Mirounga leoninar), mock-fighting on the beach in Gold Harbor, South Georgia, Polar Regions

Southern elephant seal bull (Mirounga leoninar), on the beach at sunrise in Gold Harbor, South Georgia, Polar Regions

Southern elephant seal bull (Mirounga leoninar), sounding a challenge on the beach at Gold Harbor, South Georgia, Polar Regions

Young southern elephant seal bulls (Mirounga leoninar), mock-fighting on the beach in Gold Harbor, South Georgia, Polar Regions

Southern elephant seal bull (Mirounga leoninar), in the tussah grass at Salisbury Plain, South Georgia, Polar Regions

Female southern elephant seal with young male (Mirounga leoninar), on the beach at Salisbury Plain, South Georgia, Polar Regions

Southern elephant seal bull (Mirounga leoninar), on the beach at sunrise in Gold Harbor, South Georgia, Polar Regions

Southern elephant seal (Mirounga leoninar) weaners at breeding beach in Gold Harbor, South Georgia, Polar Regions

Southern elephant seal pup (Mirounga leoninar), on the beach at dawn in 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), at breeding beach in Gold Harbor, South Georgia, Polar Regions

Southern elephant seals (Mirounga leoninar), on the beach at sunrise in Gold Harbor, South Georgia, Polar Regions

Rusting machinery and buildings at the abandoned whaling station at Stromness Harbor, South Georgia, Polar Regions

A feeding frenzy of sea birds diving on small baitfish near Isla San Pedro Esteban, Baja California, 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

California gray whales (Eschrichtius robustus), courtship behavior, San Ignacio Lagoon, Baja California Sur, Mexico, North America

A Crown of Thorns starfish (Acanthaster planci), on a tropical coral reef, in Gaafu Dhaalu atoll, The Maldives, Indian Ocean, Asia

Small reef fish crowd around outcrops of Pocillopora species hard corals, a coral reef in Gaafu Dhaalu atoll, The Maldives, Indian Ocean, Asia

A mix of Acropora species hard corals, on a tropical coral reef, around Gaafu Dhaalu atoll, in the south of The Maldives, Indian Ocean, Asia

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

Young whale shark (Rhincodon typus), filter feeding near the surface at El Mogote, Baja California Sur, Mexico, North America

Young whale shark (Rhincodon typus), filter feeding near snorkeler at El Mogote, Baja California Sur, Mexico, North America

Adult polar bear (Ursus maritimus), reflected in the sea on ice near Ellesmere Island, Nunavut, Canada, North America

Adult Atlantic walrus (Odobenus rosmarus), on the beach in Musk Ox Fjord, Ellesmere Island, Nunavut, Canada, North America

Antarctic shag (Leucocarbo bransfieldensis) in breeding plumage, Barrientos Island, Antarctica, Polar Regions

Chinstrap penguin (Pygoscelis antarcticus), leaping from the sea at breeding colony on Barrientos Island, Antarctica, Polar Regions

Antarctic shag (Leucocarbo bransfieldensis) in breeding plumage, Barrientos Island, Antarctica, Polar Regions

A group of Adelie penguins (Pygoscelis adeliae) on sea ice in Duse Bay, Weddell Sea, Antarctica, Polar Regions

Adult bull killer whale (Orcinus orca), power-lunging while feeding on fish along the coast of eastern Greenland, Polar Regions

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

Adult humpback whale (Megaptera novaeangliae), flukes-up dive in Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Adult humpback whale (Megaptera novaeangliae) flukes-up dive in Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Adult humpback whale (Megaptera novaeangliae), flukes-up dive at sunset in Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Adult humpback whale (Megaptera novaeangliae), flukes-up dive in Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Adult humpback whale (Megaptera novaeangliae), flukes-up dive in Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Steller sea lion (Eumetopias jubatus), haul out site, South Marble Islands, Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Steller sea lions (Eumetopias jubatus), haul out site, South Marble Islands, Glacier Bay National Park, UNESCO World Heritage Site, Alaska, United States of America, North America

Adelie penguin (Pygoscelis adeliae), porpoising in the sea in Antarctic Sound, Trinity Peninsula, Antarctica, Polar Regions

Adelie penguins (Pygoscelis adeliae), porpoising in the sea in Antarctic Sound, Trinity Peninsula, Antarctica, Polar Regions

Humpback whale (Megaptera novaeangliae), mother and calf underwater on the Silver Bank, Dominican Republic, Greater Antilles, Caribbean, Central America

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

Adelie penguins (Pygoscelis adeliae), on an ice floe at a breeding colony on Joinville Island, Antarctica, Polar Regions

Chinstrap penguins (Pygoscelis antarcticus), leaping in to the sea on Coronation Island, South Orkneys, Antarctica, Polar Regions

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

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

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

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

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

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

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

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

A large adult leopard seal (Hydrurga leptonyx), hauled out on sea ice near Brabant Island, Antarctica, Polar Regions

A large adult leopard seal (Hydrurga leptonyx), hauled out on sea ice near Brabant Island, Antarctica, Polar Regions

A pair of adult bull Antarctic fur seals (Arctocephalus gazella), fighting in Right Whale Bay, South Georgia, South Atlantic, Polar Regions

Over a million chinstrap penguins (Pygoscelis antarcticus), on Zavodovski Island, South Sandwich Islands, South Atlantic, Polar Regions

Adult gentoo penguins (Pygoscelis papua) on the beach at daybreak at Gold Harbor, South Georgia Island, South Atlantic, Polar Regions

Adult wandering albatross (Diomedea exulans), courtship display on Prion Island, Bay of Isles, South Georgia, South Atlantic, Polar Regions

Southern rockhopper penguins (Eudyptes chrysocome), jumping in huge waves to sea on New Island, Falklands, South America

Southern rockhopper penguins (Eudyptes chrysocome), jumping in huge waves to sea on New Island, Falklands, South America

Adult olive-headed sea snake (Hydrophis major), swimming on Ningaloo Reef, Western Australia, Australia, Pacific

Whale shark (Rhincodon typus), underwater with snorkeler on Ningaloo Reef, Western Australia, Australia, Pacific

Whale shark (Rhincodon typus), underwater with snorkeler on Ningaloo Reef, Western Australia, Australia, Pacific

Whale shark (Rhincodon typus), underwater with snorkelers on Ningaloo Reef, Western Australia, Australia, Pacific

Whale shark (Rhincodon typus), underwater with snorkeler on Ningaloo Reef, Western Australia, Australia, Pacific

Adult false killer whales (Pseudorca crassidens), surfacing on Ningaloo Reef, Western Australia, Australia, Pacific

A pod of killer whales (Orcinus orca), attacking a humpback whale on Ningaloo Reef, Western Australia, Australia, Pacific

A pod of mammal eating killer whales (Orcinus orca), surfacing on Ningaloo Reef, Western Australia, Australia, Pacific

Humpback whale (Megaptera novaeangliae), adult flukes up dive on Ningaloo Reef, Western Australia, Australia, Pacific

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

A young male polar bear (Ursus maritimus) on an ice floe in Baffin Bay, Nunavut, Canada, North America

A curious young male polar bear (Ursus maritimus) leaping on the sea ice near Somerset Island, Nunavut, Canada, North America

A curious young male polar bear (Ursus maritimus) walking on the sea ice near Somerset Island, Nunavut, Canada, North America

A curious young male polar bear (Ursus maritimus) walking on the sea ice near Somerset Island, Nunavut, Canada, North America

A curious young male polar bear (Ursus maritimus) standing up on the sea ice near Somerset Island, Nunavut, Canada, North America

A curious young male polar bear (Ursus maritimus) leaping on the sea ice near Somerset Island, Nunavut, Canada, North America

Immature Antarctic Shag (Leucocarbo bransfieldensis), Paulet Island, Weddell Sea, Antarctica, Polar Regions

An adult humpback whale (Megaptera novaeangliae), flukes up dive amongst the icebergs in Ilulissat, Greenland, Denmark, Polar Regions

A pod of transient killer whales (Orcinus orca), catching and killing an elephant seal in Monterey Bay Marine Sanctuary, California, United States of America, North America