Adult female leopard seal (Hydrurga leptonyx) hauled out on an ice floe in Kayak Cove on Brabant Island, Antarctica, Polar Regions

Northern giant petrel (Macronectes halli) scavenging and feeding on a dead fur seal pup at St. Andrews Bay, South Georgia

Chinstrap penguin (Pygoscelis antarctica) porpoising in Cooper Bay, South Georgia

Skull of an adult female leopard seal (Hydrurga leptonyx), on display at the Natural History Museum in Stanley, Falkland Islands, South America

Pregnant female southern elephant seal (Mirounga leonina) giving birth on the beach in Stromness Bay, South Georgia Island

Pregnant female southern elephant seal (Mirounga leonina) giving birth on the beach in Stromness Bay, South Georgia Island

Chinstrap penguin (Pygoscelis antarctica) porpoising in Cooper Bay, South Georgia

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

Leucistic caused by lack of melanin, or blond Antarctic fur seal pup (Arctocephalus gazella) on South Georgia, Polar Regions

Adult male Antarctic fur seals (Arctocephalus gazella) hauled out on ice near Brown Bluff, Antarctica, Polar Regions

Antarctic fur seal bull (Arctocephalus gazella) on South Georgia, Southern Ocean, Polar Regions

Northern giant petrels (Macronectes halli) fighting over the scavenging rights to a dead elephant seal pup at Royal Harbor, South Georgia

Adult bearded seal (Erignathus barbatus) swimming amongst the ice in the Svalbard Archipelago, Norway

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

Southern elephant seal (Mirounga leonina) mating behavior on South Georgia Island, Southern Ocean

Southern elephant seal (Mirounga leonina) mating behavior on South Georgia Island, Southern Ocean

Southern elephant seal (Mirounga leonina) mating behavior on South Georgia Island, Southern Ocean

The Lindblad Expedition ship National Geographic Explorer in Dahlman Bay in late evening light as the waxing moon rises on the west side of the Antarctic Peninsula in Antarctica.

The Lindblad Expedition ship National Geographic Explorer in Dahlman Bay in late evening light as the waxing moon rises on the west side of the Antarctic Peninsula in Antarctica.