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.

Jordi Chias / Crabeater seals (Lobodon carcinophaga) resting on ice floating ice sheet, 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 / Weddell seal (Leptonychotes weddellii) hauled out on ice, Antarctic Peninsula, Antarctica.

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

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

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

Gerrit Vyn / Spotted seal (Phoca largha) pup resting on a the gravel beach of the Bering Sea. Chukotka, Russia. July.

Wim van den Heever / South African fur seal (Arctocephalus pusillus pusillus) with setting sun, Walvis Bay, Namibia.

Cyril Ruoso / South american sea lion (Otaria byronia) and American fur seal (Arctocephalus australis) hauled out on the shore of Punta Coles Reserve, Peru.

Franco Banfi / Walrus (Odobenus rosmarus) hauled out in shallow water, Spitsbergen, Svalbard Archipelago, Norway, Arctic Ocean. July.

Franco Banfi / Walrus (Odobenus rosmarus) male and female, hauled out in shallow water, Spitsbergen, Svalbard Archipelago, Norway, Arctic Ocean. July.

SCOTLAND: The Big Picture / Grey seals (Halochoerus grypus) hauled out along the banks of the Ythan Estuary, agiatated, Aberdeenshire, Scotland, UK, February.

Staffan Widstrand / Bearded seal (Erignathus barbatus) hauled out on ice, Spitsbergen, Svalbard, Norway, September.

Roland Seitre / Blackish cinclodes (Cinclode fuligineux) on beach with Southern Elephant-Seal (Mirounga leonina). This species feeds on dead skin of the seal. Falklands Islands.

Ole Jorgen Liodden / Bearded seal (Erignathus barbatus) hauled out on ice, Spitsbergen, Svalbard, Norway, July.

Ole Jorgen Liodden / Walruses (Odobenus rosmarus) adult and young hauled on ice. Hinlopen, Svalbard, Norway, June.

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) group on beach, Galapagos

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) juvenile on beach, Galapagos

Olga Kamenskaya / Baikal seals (Pusa sibirica) hauled out on rock. Endemic to Lake Baikal. Russia, May.

Nick Upton / Grey seal (Halichoerus grypus) pup aged one month, rubbing its head with its flipper, yawning and settling down to rest on a sandy beach, Norfolk, England, UK, January.

Eric Baccega / Male Steller sea lion (Eumetopias jubatus) with a group of females hauled out at a rookery, Prince Rupert, British Columbia, Canada, June.

Benjamin Barthelemy / Common seal (Phoca vitulina) pup hauled out on a beach at sunrise, Donna Nook Lincolnshire Wildlife Trust Reserve, Lincolnshire, England, UK, January.

Benjamin Barthelemy,Benjamin Barthelemy / Grey seal (Halichoerus grypus) hauled out on a beach at sunrise, Donna Nook Lincolnshire Wildlife Trust Reserve, Lincolnshire, England, UK, January.

Staffan Widstrand / Ringed seal (Pusa hispida) hauled out on rock, Svalbard, Norway

David Tipling / 2020VISION / Grey Seal (Halichoerus grypus) hauled out on rocks, in mid-moult. Farne Islands, Northumberland, July.

Chris Gomersall / 2020VISION / Atlantic grey seal (Halichoerus grypus) hauled out on rocks at the Cairns of Coll, with flipper in the air, Inner Hebrides, Scotland, UK, July 2011.

Terry Whittaker / 2020VISION / Common seals (Phoca vitulina) hauled out on saltmarsh, Wallasea Wild Coast Project, RSPB Greater Thames Futurescapes Project, Wallasea Island, Essex, England, UK, October

Terry Whittaker / 2020VISION / Common / Harbour seals (Phoca vitulina) hauled out on mudflats at saltmarsh, Wallasea Island RSPB reserve, Essex, UK, March 2011

Brent Stephenson / Crabeater Seal (Lobodon carcinophaga) hauled out on ice. Pleneau Island, Antarctica, January.

Ingrid Abery / Fisheye view of ACC yacht hauled out at the 'race village', Louis Vuitton Trophy, Nice, South France. November 2009.

Niall Benvie / Common seal hauled out {Phoca vitulina} Islay, Argyll, Scotland

Staffan Widstrand / Walrus hauled out {Odobenus rosmarus} Chukotka, Siberia, Russia

Erlend Haarberg / Common seal (Phoca vitulina), Svalbard, Norway, July.

Erlend Haarberg / Walrus (Odobenus rosmarus) group hauled out on ice, Svalbard, Norway, August.

Kerstin Hinze / Male Grey seal (Halichoerus grypus) hauled out on a beach, yawning, Heligoland, Schleswig-Holstein, Germany, December.

Kerstin Hinze / Male Grey seal (Halichoerus grypus) hauled out on a beach, looking around, Heligoland, Schleswig-Holstein, Germany, December.

Kerstin Hinze / Male Grey seal (Halichoerus grypus) hauled out on a beach, Heligoland, Schleswig-Holstein, Germany, December.

Pascal Kobeh / Group of Grey seals (Halichoerus grypus grypus) resting on a rock around Bonaventure Island, Gulf of Saint Lawrence, Canada

Edwin Giesbers / Grey seal (Halichoerus grypus) male and female, mating behaviour, Heligoland, Germany.

Edwin Giesbers / Grey seal (Halichoerus grypus) male and female, mating behaviour, Heligoland, Germany.

Edwin Giesbers / Grey seal (Halichoerus grypus) hauled out on beach. Heligoland, Germany.

Edwin Giesbers / Grey seal (Halichoerus grypus) hauled out by lighthouse, Heligoland, Germany.

Edwin Giesbers / Grey seal (Halichoerus grypus), mother with suckling pup. Heligoland, Germany.

Edwin Giesbers / Grey seal (Halichoerus grypus), mother playing with pup, Heligoland, Germany.

Edwin Giesbers / Grey seal (Halichoerus grypus), pup on beach, Heligoland, Germany.