Uri Golman / Harp seal (Pagophilus groenlandicus) pup swimming in a hole in the ice, Magdalen Islands, Canada. March.

Alex Mustard / RF - Grey seal (Halichoerus grypus) relaxing in a bed of kelp (Laminaria digitata), with two seals in the background. Farne Islands, Northumberland, England, United Kingdom. British Isles. North Sea....

Ben Cranke / Southern elephant seals (Mirounga leonina) subadult males practice sparring. St Andrew's Bay, South Georgia Island

Ben Cranke / Southern elephant seal (Mirounga leonina) and her newborn pup, bonding with calling and nuzzling. Salisbury plain, South Georgia Island

Ben Cranke / King penguins (Aptenodytes patagonicus) congregate on the beach, seeking a safe point to go into the sea, with male Southern elephant seals (Mirounga leonina) blocking their path. St Andrew's Bay,...

Jeff Foott / Leopard seal (Hydrurga leptonyx) resting on ice with three Adelie penguin (Pygoscelis adeliae) behind, Antarctica.

Mark MacEwen / Southern elephant seal (Mirounga leonina), two females sleeping. St Andrews Bay, South Georgia. October.

Pal Hermansen / Bearded seal (Erignathus barbatus) hauled out on ice, reflected in water. Svalbard, Norway. May.

Danny Green / Arctic fox (Vulpes lagopus) carrying Ringed seal (Pusa hispida) pup prey in mouth. Svalbard, Norway, April.

Danny Green / Arctic fox (Vulpes lagopus) standing in snow besides Ringed seal (Pusa hispida) pup prey. Svalbard, Norway, April.

Olga Kamenskaya / Baikal seal (Pusa sibirica) pup on ice, endemic species. Lake Baikal, Russia, April.

David Hall / Harbor seal (Phoca vitulina) using a large,encrusted boulder as a tool to scratch itself against, Gowland Harbour, Quadra Island, British Columbia, Canada. March.

John Cancalosi / Grey seal (Halichoerus grypus) pup 'waving', UK

John Cancalosi / Grey seal (Halichoerus grypus), mother and young interacting on beach, UK

Danny Green / Ringed seal (Pusa hispida) resting on ice, reflected in water. Svalbard, Norway. July.

Danny Green / Ringed seal (Pusa hispida) and pup resting on ice. Svalbard, Norway. April.

Danny Green / Polar bear (Ursus maritimus) hunting Seal on sea ice. Svalbard, Norway, July 2018.

Jordi Chias / Crabeater seals (Lobodon carcinophaga) resting on ice floating ice sheet, Antarctic Peninsula, Antarctica.

Jordi Chias / Crabeater seals (Lobodon carcinophaga), Antarctic Peninsula, Antarctica.

Jordi Chias / Leopard seal (Hydrurga leptonyx) with mouth open, Antarctic Peninsula, Antarctica.

Jordi Chias / Leopard seal (Hydrurga leptonyx), Antarctic Peninsula, Antarctica.

Jordi Chias / Leopard seal (Hydrurga leptonyx) resting over an iceberg, Antarctic Peninsula, Antarctica.

Jordi Chias / Leopard seal (Hydrurga leptonyx) resting over an iceberg, Antarctic Peninsula, Antarctica.

Jordi Chias / Leopard seal (Hydrurga leptonyx) swimming underwater, Antarctic Peninsula, Antarctica.

Jordi Chias / Leopard seal (Hydrurga leptonyx) resting over an iceberg, Antarctic Peninsula, Antarctica.

Jordi Chias / Crabeater seal (Lobodon carcinophaga) hunting under water, Antarctic Peninsula, Antarctica.

Jordi Chias / Leopard seal (Hydrurga leptonyx) swimming, Antarctic Peninsula, Antarctica.

Jordi Chias / Leopard seal (Hydrurga leptonyx) predating a Gentoo penguin (Pygoscelis papua) Antarctic Peninsula, Antarctica.

Jordi Chias / Weddell seal (Leptonychotes weddellii) hauled out on ice, Antarctic Peninsula, Antarctica.

Jordi Chias / Weddell seal (Leptonychotes weddellii), Antarctic Peninsula, Antarctica.

Jordi Chias / Weddell seal (Leptonychotes weddellii), Antarctic Peninsula, Antarctica.

Jordi Chias / Weddell seal (Leptonychotes weddellii), Antarctic Peninsula, Antarctica.

Nick Hawkins / Grey seal (Halichoerus grypus) opening mouth close up off Bonaventure Island, Gulf of Saint Lawrence, Quebec, Canada. September.

SCOTLAND: The Big Picture / Grey seal (Halichoerus grypus) pup on a breeding beach, Orkney, Scotland, UK, April.

SCOTLAND: The Big Picture / Grey seal (Halichoerus grypus) huge group hauled out on a beach, Island of Mingulay, west coast of Scotland. May.

SCOTLAND: The Big Picture / Grey seal (Halichoerus grypus) using freshwater pools along the shore line and in the adjacent fields as place to learn to swim, Orkney, Scotland, UK, April.

SCOTLAND: The Big Picture / Young grey seal pup (Halichoerus grypus) recently born on a beach in Orkney, Scotland, UK, April.

David Tipling / Grey seal (Halichoerus grypus) female in surf, Horsey, Norfolk, England, UK, February.

David Tipling / Grey seal (Halichoerus grypus) pup, Horsey, Norfolk, England, UK, February.

Stefan Christmann / Weddell seal (Leptonychotes weddellii) female hauled out with pup, Atka Bay, Queen Maud Land, Antarctica. October.

Alex Hyde / Southern Elephant Seal bull (Mirounga leonina) close up portrait, King Haakon Bay, South Georgia. November.

Alex Hyde / Southern Elephant Seals (Mirounga leonina) pup with mother. King Haakon Bay, South Georgia. November.

Alex Hyde / Colonies of King penguins (Aptenodytes patagonicus) and Southern Elephant Seals (Mirounga leonina) on beach at St. Andrews Bay, South Georgia. November.

Guy Edwardes / Grey Seal (Halichoerus grypus) playing in waves at Donna Nook, Lincolnshire, England, UK, January.

Guy Edwardes / Grey seals (Halichoerus grypus) females playing on beach at Donna Nook, Lincolnshire, England, UK, January

Guy Edwardes / Grey Seal (Halichoerus grypus) pup on beach at Donna Nook, Lincolnshire, England, UK, January.

Sven Zacek / Bearded seal (Erignathus barbatus) sunbathing on iceberg broken off from glacier. Kongsfjorden fjord, Spitsbergen, Norway. June 2014.

Klein & Hubert / Harp seal (Pagophilus groenlandicus) pup on ice, Gulf of St. Lawrence, Canada