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

Female southern elephant seal (Mirounga leonina) with newborn pup on the beach in Stromness Bay, South Georgia Island

Habor seal (Phoca vitulina) in kelp, Todos Santos Island west of Mexico.

Southern elephant seal (Mirounga leonina) pup, called weaners once their mothers stop nursing them, South Georgia Island, Southern Ocean

Southern elephant seal (Mirounga leonina) pup, called weaners once their mothers stop nursing, South Georgia Island, Southern Ocean

A newborn Grey Seal pup (Halichoerus grypus) on the shore in winter, at Donna Nook Nature Reserve, on the North Sea coast of Lincolnshire, Great Britain.

A young Grey Seal pup (Halichoerus grypus) on the shore in winter, at Donna Nook Nature Reserve, on the North Sea coast of Lincolnshire, Great Britain.

Antarctic fur seal pups (Arctocephalus gazella) mock-fighting on South Georgia, Southern Ocean, Polar Regions

Antarctic fur seal pups (Arctocephalus gazella) mock-fighting on South Georgia, Southern Ocean, Polar Regions