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Southern elephant seal (Mirounga leonina) bull holding adult female in the surf to mate with her, South Georgia, Polar Regions

Southern elephant seal (Mirounga leonina) challenger bull head detail at Gold Harbour on South Georgia Island, Polar Regions

Curious adult bull walrus (Odobenus rosmarus rosmarus) approach the ship at Moffen Island in the Svalbard Archipelago, Norway, Arctic, Europe

Adult bull southern elephant seal (Mirounga leonina) hauled out to molt at Grytviken on South Georgia, Polar Regions

Adult bull Weddell seal (Leptonychotes weddellii) hauled out on ice near the Antarctic Peninsula, Antarctica, Polar Regions

Adult bull southern elephant seals (Mirounga leonina) fighting for breeding grounds on South Georgia Island, Southern Ocean

Southern elephant seal bull (Mirounga leoninar), on the beach at sunrise 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 (Mirounga leonina), beachmaster bull with female harem, Right Whale Bay, South Georgia, UK Overseas Protectorate, Polar Regions

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

Adult Antarctic fur seal (Arctocephalus gazella), bull and cow on Prion Island, South Georgia Island, South Atlantic, Polar Regions

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

Southern elephant seal (Mirounga leonina) bull holding female down for mating, Right Whale Bay, South Georgia, UK Overseas Protectorate, Polar Regions

Adult bull Antarctic fur seal (Arctocephalus gazella), head detail, Stromness Harbor, South Georgia, Polar Regions

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

Southern elephant seal (Mirounga leonina) bull holding female down for mating, Right Whale Bay, South Georgia, UK Overseas Protectorate, Polar Regions

Antarctic fur seal (Arctocephalus gazella) male defending territory, Stromness Harbor, South Georgia, UK Overseas Protectorate, Polar Regions

Antarctic fur seal harem (Arctocephalus gazella) at the old whaling station at Grytviken, South Georgia Island, Polar Regions

Bull California sea lion (Zalophus californianus), on the beach in Puerto Refugio, Baja California, Sea of Cortez, Mexico, North America

Southern elephant seal bull (Mirounga leonina), molting in Gold Harbor, South Georgia, UK Overseas Protectorate, Polar Regions

Adult bull Antarctic fur seal (Arctocephalus gazella) head detail in Salisbury Plain, South Georgia, Polar Regions

Two adult bull southern elephant seals (Mirounga leonina), fighting on the beach on Snow Island, Antarctica, Polar Regions

Antarctic fur seal (Arctocephalus gazella) adult bull, Prion Island, South Georgia, UK Overseas Protectorate, Polar Regions

Four adult bull southern elephant seals (Mirounga leonina), fighting on the beach on Snow Island, Antarctica, Polar Regions

Southern elephant seal bull (Mirounga leoninar), at breeding beach in King Haakon Bay, South Georgia, Polar Regions

Two adult bull southern elephant seals (Mirounga leonina), fighting on the beach on Snow Island, Antarctica, Polar Regions

Two young bull southern elephant seals (Mirounga leonina), fighting on the beach on Snow Island, Antarctica, Polar Regions

A bull Antarctic fur seal (Arctocephalus gazella), on the rocks at Coronation Island, South Orkneys, Antarctica, Polar Regions

Southern elephant seal bull (Mirounga leonina) molting in Gold Harbor, South Georgia, UK Overseas Protectorate, Polar Regions

Southern elephant seal bull (Mirounga leoninar), throwing sand at breeding beach in St. Andrews Bay, South Georgia, Polar Regions

Adult bull northern fur seal (Callorhinus ursinus) on St. Paul Island, Pribilof Islands, Alaska, United States of America, North America

Antarctic fur seal (Arctocephalus gazella) males defending territories, Stromness Harbor, South Georgia, UK Overseas Protectorate, Polar Regions

Adult bull Antarctic fur seal (Arctocephalus gazella) with his harem of females, Godthul, South Georgia Island, Polar Regions

Adult endemic South Georgia pipit (Anthus antarcticus), near elephant seal bull in Gold Harbor, South Georgia, Polar Regions

Adult bull Antarctic fur seal (Arctocephalus gazella), hauled out on first year sea ice in the Weddell Sea, Antarctica, Polar Regions

Southern elephant seal bull (Mirounga leonina), in Stromness Harbor, South Georgia, UK Overseas Protectorate, Polar Regions

Two young bull southern elephant seals (Mirounga leonina), fighting on the beach on Snow Island, Antarctica, Polar Regions

Adult bull northern elephant seal (Mirounga angustirostris), Benito del Oeste Island, Baja California, Mexico, North America

King penguins (Aptenodytes patagonicus), near bull elephant seal in Gold Harbor, South Georgia, Polar Regions

Bronze statue in memory of Nelson a bull grey seal who frequented Looe island and harbour, Looe, Cornwall, England, United Kingdom, Europe

Southern elephant seal (Mirounga leonina) bull, Hannah Point, South Shetland Isles, Antarctica, Polar Regions

Southern elephant seal (Mirounga leonina) bull roaring, Hannah Point, South Shetland Isles, Antarctica, Polar Regions

A massive bull, beach master Southern Elephant Seal; Mirounga leonina, at Jason Harbour, South Georgia, Antarctica, with tourists from an expedtion cruise ship.

Large bull Southern Elephant Seal; Mirounga leonina, fighting at Gold Harbour, South Georgia, Antarctica, in a King Penguin colony.

Southern Elephant Seals; Mirounga leonina, at Hannah Point, on livingston Island in the South Shetland Islands off the Antarctica Peninsular.

A massive bull, beach master Southern Elephant Seal; Mirounga leonina, at Jason Harbour, South Georgia, Antarctica.

A Bull Antarctic Fur Seal (Arctocephalus gazella) at Salisbury Plain, South Georgia, Southern Ocean, showing a threat display.

A Bull Antarctic Fur Seal (Arctocephalus gazella) on an iceberg in Drygalski Fjord, Antarctic Peninsular,

Southern seal (mirounga leonina) gold harbour, south georgia, aggressive bull on the beach, bellowing, beachmaster.

Antarctic fur seal (arctocephalus gazella) fortuna bay, south georgia, portrait of bull seal showing teeth.

Adult bull Southern elephant seal (Mirounga leonina) hauled out and in a wallow while molting on the beach at Fortuna Bay on South Georgia Island, southern Atlantic Ocean.

Adult bull southern elephant seals (Mirounga leonina) fighting for breeding grounds on South Georgia Island in the Southern Ocean

Adult bull California Sea Lion (Zalophus californianus) hauled out (note the well developed sagital crest denoting a male) at Race Rocks, British Columbia, Canada.

Grey Seal (Halichoerus grypus) close up head shot of bull with mouth open showing aggression and a wave breaking over his head.. Mull of Kintyre near Campbeltown, Argyll, Scotland, UK

Grey Seal (Halichoerus grypus),close up of bull looking up framed by out of focus rocks and scratching face with fin.. Mull of Kintyre near Campbeltown, Argyll, Scotland, UK

Adult bull Southern elephant seal (Mirounga leonina) hauled out and in a wallow while molting on the beach at Fortuna Bay on South Georgia Island, southern Atlantic Ocean.

Adult bull southern elephant seal (Mirounga leonina) on the beach at President Head on Snow Island in the South Shetland Island Group, Antarctica

Adult bull northern (Steller) sea lion (Eumetopias jubatus) hauled out on the Brothers Island Group in Frederick Sound, Southeast Alaska, USA. Pacific Ocean

Grey Seal (Halichoerus grypus) close up head shot of bull with mouth open showing aggression. Mull of Kintyre near Campbeltown, Argyll, Scotland, UK

Adult bull southern elephant seal (Mirounga leonina) on the beach on Torgesen Island just outside Palmer Station in Port Arthur, Antarctica

Adult bull Southern elephant seals (Mirounga leonina) hauled out and yawning in a wallow while molting on the beach at Fortuna Bay on South Georgia Island, southern Atlantic Ocean.

Adult bull Southern elephant seals (Mirounga leonina) hauled out and in a wallow while molting at the abandonded whaling station at Grytviken on the island of South Georgia, southern Atlantic Ocean.

Adult bull Southern elephant seal (Mirounga leonina) threat posture while hauled out and in a wallow while molting at the abandonded whaling station at Grytviken on the island of South Georgia

Adult bull California sea lion (Zalophus californianus) resting at Los Islotes (the islets) just outside of La Paz, Baja California Sur in the Gulf of California (Sea of Cortez), Mexico.

Adult bull Southern Elephant Seal (Mirounga leonina) hauled out (note huge proboscis) on Peninsula Valdes, Argentina. Atlantic Ocean.

Adult Bull Southern Elephant Seal (Mirounga leonina) on the beach at Golfo Nuevo, Patagonia, Argentina.

Adult bull with adult female southern elephant seal (Mirounga leonina) on Torgesen Island just outside Palmer Station in Port Arthur, Antarctica

Grey Seal (Halichoerus grypus) female fighting bull to protect her pup. Mull of Kintyre near Campbeltown, Argyll, Scotland, UK

Young adult bull southern elephant seal (Mirounga leonina) holding a young pup's head underwater on South Georgia Island in the Southern Ocean

Southern Elephant Seal (Mirounga leonina) mother/bull/pup in Peninsula Valdes, Patagonia, Argentina. South Atlantic Ocean.

Curious northern (Steller) sea lion (Eumetopias jubatus) colony in Inian Pass near Cross Sound, southeastern Alaska

Adult bull southern elephant seal (Mirounga leonina) on Torgesen Island just outside Palmer Station in Port Arthur, Antarctica

Adult bull California sea lion (Zalophus californianus) underwater at Los Islotes (the islets) just outside of La Paz, Baja California Sur in the Gulf of California (Sea of Cortez), Mexico.

Grey Seal (Halichoerus grypus) close up of bull head. Mull of Kintyre near Campbeltown, Argyll, Scotland, UK

Adult bull California sea lion (left) and female (right) (Zalophus californianus) at Los Islotes (the islets), Baja California Sur in the Gulf of California (Sea of Cortez), Mexico.

Adult bull southern elephant seal (Mirounga leonina) flipping sand onto its back to cool off on South Georgia Island in the Southern Ocean

Adult bull Antarctic Fur Seal (Arctocephalus gazella) on the island of South Georgia, southern Atlantic Ocean