Tui De Roy / Marine iguana (Amblyrhynchus cristatus) emerging from sea onto beach, with Sally lightfoot crabs (Grasopus graspus) and Galapagos Fur Seal in background. Galapagos Islands, Ecuador, June.

Tui De Roy / Galapagos fur seal (Arctocephalus galapagoensis) large territorial bull on volcanic rocks. South Coast Cerro Azul (Cinco Cerros), Isabela, Galapagos Islands, Ecuador, June.

Brent Stephenson / Weddell Seal (Leptonychotes weddellii) with wet fur after hauling onto a beach. Neko Harbour, Antarctic Peninsula, Antarctica, December.

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

Fergus Gill / Grey seal pup (Halichoerus grypus) sleeping on a windswept beach. Scotland, Nov

Juan Carlos Munoz / Group of South American fur seals (Arctocephalus australis) swimming near the rocky shore. Puerto Deseado, Patagonia, Argentina, March 2008

Juan Carlos Munoz / South African fur seal (Arctocephalus pusillus pusillus) swimming near surface, Seal Island. False Bay, South Africa, July 2010

Alex Mustard / Silhouette of a New Zealand fur seal (Arctocephalus forsteri) diving underwater, Tasmania, Australia.

Claudio Contreras / Guadalupe fur seal (Arctocephalus townsendi) pup playing underwater, Guadalupe Island Biosphere Reserve, off the coast of Baja California, Mexico, March

Claudio Contreras / Guadalupe fur seal (Arctocephalus townsendi) viewed from above, in the surf, Guadalupe Island Biosphere Reserve, off the coast of Baja California, Mexico, February

Claudio Contreras / Guadalupe fur seal (Arctocephalus townsendi) pup swimming, Guadalupe Island Biosphere Reserve, off the coast of Baja California, Mexico, April

Claudio Contreras / Guadalupe fur seal (Arctocephalus townsendi) pup portrait in shallow water, Guadalupe Island Biosphere Reserve, off the coast of Baja California, Mexico, March

Claudio Contreras / Guadalupe fur seal (Arctocephalos townsendi) head portrait of pup, Guadalupe Island Biosphere Reserve, off the coast of Baja California, Mexico, March

Claudio Contreras / Two Guadalupe fur seals (Arctocephalus townsendi) males fighting for dominance, Guadalupe Island Biosphere Reserve, off the coast of Baja California, Mexico. April

Guy Edwardes / Juvenile Grey Seal {Halichoerus grypus} rolling on sand, waving flipper, Donna Nook, Lincolnshire, England, January

Andy Rouse / Aerial view of Rockhopper penguins (Eudyptes chrysocome chrsocome) landing from sea and walking through colony of South american fur seals (Arctocephalus australis) Falkland Islands (non-ex)

Pete Oxford / Galapagos Fur Seal (Arctocephalus galapagoensis) just below the surface off of Wolf Island, Galapagos Islands, Ecuador, South America

Juergen Freund / New Zealand fur seals (Arctocephalus forsteri) swimming amongst kelp. Albany, Western Australia

Anup Shah / Fur Seal pair mating (Arctocephalus pusillus pusillus) Cape Cross Seal Reserve, Namibia

Anup Shah / Fur Seal pair mating (Arctocephalus pusillus pusillus) Cape Cross Seal Reserve, Namibia

Anup Shah / Fur Seal pair mating (Arctocephalus pusillus pusillus) Cape Cross Seal Reserve, Namibia

Pete Oxford / Galapagos Fur Seal swimming {Arctocephalus galapagoensis} Santiago Is, Galapagos

Doug Allan / Harp seal pup {Phoca groenlandica} Gulf of St Lawrence Canada

David Tipling / Northern fur seal (Callorhinus ursinus) bull. St Paul Island, Pribilof's, Bering Sea, Alaska

Andrew Walmsley / New Zealand Fur Seal (Arctocephalus forsteri) head portrait. Kaikoura, New Zealand, October.

Sue Flood / Northern fur seal (Callorhinus ursinus) at sea surface, Skaly Lovushky, the Kuril Islands, Russian Far East

Sue Flood / Northern fur seals (Callorhinus ursinus) looking down on breeding colony with male, female and new born pups all resting on Tyuleniy Island, Russian Far East, June.

Sue Flood / Northern fur seals (Callorhinus ursinus) breeding colony with male, female and new born pups all resting on Tyuleniy Island, Russian Far East, June.

Sue Flood / Northern fur seal (Callorhinus ursinus) female nursing new born pup with others behind, Tyuleniy Island, Russian Far East, June

Sue Flood / Northern fur seal (Callorhinus ursinus) male, female and new born pup on Tyuleniy Island, Russian Far East, June

Mark Carwardine / South African / Cape fur seals swimming {Arctocephalus p pusillus} W Cape, South Africa

Mark Carwardine / South African / Cape fur seals swimming {Arctocephalus p pusillus} W Cape, South Africa

Mark Carwardine / South african / Cape fur seals on rocks {Arctocephalus p pusillus} W Cape, South Africa

Mark Carwardine / Guadalupe fur seal {Arctocephalus townsendi} Baja California, Mexico

Mark Carwardine / Southern elephant seal moulting {Mirounga leonina} Falkland Is

Mark Carwardine / Antarctic fur seal {Arctocephalus gazella} S Shetland Is, Antarctica.

Mark Carwardine / Juan Fernandez fur seal swimming {Arctocephalus philippii} Juan Fernandez Is, Chile, threatened

Mark Carwardine / Juan Fernandez fur seal {Arctocephalus philippii} Juan Fernandez Is, Chile, threatened

Mark Carwardine / Juan Fernandez fur seals {Arctocephalus philippii} Juan Fernandez Is, Chile, threatened

Mark Carwardine / Juan Fernandez fur seal {Arctocephalus philippii} Juan Fernandez Is, Chile, threatened

Mark Carwardine / Juan Fernandez fur seals {Arctocephalus philippii} Juan Fernandez Is, Chile, threatened

Mark Carwardine / Juan Fernandez fur seal {Arctocephalus philippii} Juan Fernandez Is, Chile, threatened

Mark Carwardine / Juan Fernandez fur seal pup in breeding cave, Juan Fernandez Is, Chile, threatened

Mark Carwardine / Juan Fernandez fur seal {Arctocephalus philippii} Juan Fernandez Is, Chile, threatened

Mark Carwardine / Juan Fernandez fur seal pups in breeding cave, Juan Fernandez Is, Chile, threatened

Konrad Wothe / Antarctic Fur Seal (Arctocephalus gazella) Half Moon Island, South Shetland Island, Antarctica. February.

Konrad Wothe / Orcadas Base, Argentine scientific reserarch station, with researchers looking at Fur seals, Laurie Island, South Orkney Islands, Southern Ocean, Antarctica. February 2007.

Tui De Roy / Galapagos fur seal (Arctocephalus galapagoensis) large territorial bull yawning. South Coast Cerro Azul (Cinco Cerros), Isabela, Galapagos Islands, Ecuador, June.

Tui De Roy / Galapagos fur seal (Arctocephalus galapagoensis) large territorial bull. South Coast Cerro Azul (Cinco Cerros), Isabela, Galapagos Islands, Ecuador, June.

Tui De Roy / Galapagos fur seal (Arctocephalus galapagoensis) basking on rocks. Santiago Island, Galapagos, Ecuador, June.

Mary McDonald / Herd of Reindeer (Rangifer tarandus) grazing beside Antarctic fur seal (Arctocephalus gazella), St. Andrews Bay, South Georgia Island, March 2012

Dave Watts / New Zealand fur seal (Arctocephalus forsteri) resting on rocks, Tasmania, Australia

Dave Watts / New Zealand fur seal (Arctocephalus forsteri) young pup resting on rocks, Tasmania, Australia

Dave Watts / New Zealand fur seal (Arctocephalus forsteri) female resting on rocks, Tasmania, Australia

Dave Watts / New Zealand fur seal (Arctocephalus forsteri) adult male resting on rocks, Tasmania, Australia

Dave Watts / New Zealand fur seal (Arctocephalus forsteri) resting on rocks, Tasmania, Australia

Rick Tomlinson / Fur seals (Arctocephalus gazella) and gentoo penguins (Pygoscelis papua) on the shoreline, with SY "Adele" anchored in the distance. Prion Island, South Georgia, February 2007

Brent Stephenson / New Zealand Fur Seal (Arctocephalus forsteri) asleep on rocks. Ohau Point, Canterbury, New Zealand, October.

Brent Stephenson / New Zealand Fur Seal (Arctocephalus forsteri) asleep on beach. Kaikoura, Canterbury, New Zealand, October.

Brent Stephenson / New Zealand Fur Seal (Arctocephalus forsteri) swimming amongst kelp. Ohau Point, Canterbury, New Zealand, October.

Brent Stephenson / New Zealand Fur Seal (Arctocephalus forsteri) pup on rocks, looking back over its shoulder at the camera. Near Kaikoura, Canterbury, New Zealand, October.

Brent Stephenson / New Zealand Fur Seal (Arctocephalus forsteri) eating an octopus (Order Octopoda) at sea. Off Kaikoura, Canterbury, New Zealand, October.

Brent Stephenson / New Zealand Fur Seal (Arctocephalus forsteri) hauled out on rocks with a rough sea in the background. Kaikoura coast, Canterbury, New Zealand, October.

Brent Stephenson / New Zealand Fur Seal (Arctocephalus forsteri) on rocks. Ohau Point, Canterbury, New Zealand, October.

Dave Watts / Australian fur seal (Arctocephalus pusillus) territorial bull beside sleeping female, The Friars, Bruny Island, Tasmania, Australia, January

Dave Watts / Australian fur seal (Arctocephalus pusillus) scratching with flipper, The Friars, Bruny Island, Tasmania, Australia, January

Dave Watts / Australian fur seal (Arctocephalus pusillus) scratching with flipper, The Friars, Bruny Island, Tasmania, Australia, January

Dave Watts / Two Australian fur seals (Arctocephalus pusillus) interacting, The Friars, Bruny Island, Tasmania, Australia, January

Dave Watts / Australian fur seal (Arctocephalus pusillus) on rock with incoming tide, The Friars, Bruny Island, Tasmania, Australia, January

Dave Watts / Australian fur seal (Arctocephalus pusillus) colony on rocks, The Friars, Bruny Island, Tasmania, Australia, January

Dave Watts / Australian fur seal (Arctocephalus pusillus) colony on rocks, The Friars, Bruny Island, Tasmania, Australia, January

Doug Allan / Southern Fur Seals (Arctocephalus gazella) underwater in kelp. South Georgia, Antarctica, November 1992. Freeze Frame book plate page 179.

Kathryn Jeffs / Antarctic fur seal (Arctocephalus gazella) pup fast asleep on beach, Antarctica, February, Taken on location for BBC Frozen Planet series

Mark Carwardine / Guadalupe Fur Seals (Arctocephalus townsendi) play fighting in coastal waters. Threatened. San Benitos, Pacific side of Baja California, Mexico.

Pete Oxford / Galapagos Fur seal (Arctocephalus galapagoensis) on rocks in habitat, Cabo Douglas, Fernandina Island, Galapagos, endemic.

Pete Oxford / Galapagos Fur seal (Arctocephalus galapagoensis) and pup on rocks, pup was born 30 minutes earlier, Cabo Douglas, Fernandina Island, Galapagos, endemic.

Pete Oxford / Galapagos Fur seal (Arctocephalus galapagoensis) pup on rocks with Marine iguanas, Cabo Douglas, Fernandina Island, Galapagos, endemic.

Bryan and Cherry Alexander / Inuit hunter skinning seal, Northwest Greenland, 1980. 40 BELOW bookplate.

Bryan and Cherry Alexander / Inuk in fur clothing on ice ridge, looking for seals with telescope. Igloolik, Nunavut, Canadian Arctic, 1995.

Steve Nicholls / Australian fur seal (Arctocephalus pusillus) colony resting on rocks, Bruny Island, Friars Islands, Tasmania, Australia, January

Troels Jacobsen/Arcticphoto / Subantarctic Fur Seal (Arctocephalus tropicalis) male in a snowstorm. Salisbury Plain, South Georgia, sub Antarctic Islands.

Troels Jacobsen/Arcticphoto / A small colony of Subantarctic Fur Seals (Arctocephalus tropicalis) on a beach. Quest Bay, Gough Island, South Atlantic Islands.

Troels Jacobsen/Arcticphoto / Subantarctic Fur Seal (Arctocephalus tropicalis) leaping as it is swimming. Gough Island. South Atlantic Ocean.

Troels Jacobsen/Arcticphoto / Tourist zodiacs watch Subantarctic Fur Seals (Arctocephalus tropicalis) on the shore. Quest Bay, Gough Island, South Atlantic Islands, March 2007.

Troels Jacobsen/Arcticphoto / Subantarctic Fur Seal (Arctocephalus tropicalis) standing on sea smoothed volcanic rocks. Quest Bay, Gough Island, South Atlantic Islands, March 2007.

Troels Jacobsen/Arcticphoto / Subantarctic Fur Seal (Arctocephalus tropicalis) sleeping on coastal volcanic rocks. Quest Bay, Gough Island. South Atlantic Islands, March 2007.

Troels Jacobsen/Arcticphoto / Young Antarctic Fur Seal (Arctocephalus tropicalis) looking over its shoulder. Quest Bay, Gough Island, South Atlantic Islands, March.

Troels Jacobsen/Arcticphoto / Subantarctic Fur Seal (Arctocephalus tropicalis) on rounded rocks on the shore. Quest Bay, Gough Island, South Atlantic Islands, March 2007.

Troels Jacobsen/Arcticphoto / Subantarctic Fur Seal (Artcocephalus tropicalis) cub sat on rocks. Nightingale Island, part of the Tristan da Cunha group, South Atlantic, March.

Troels Jacobsen/Arcticphoto / Portrait of a Subantarctic Fur Seal (Arctocephalus tropicalis). Nightingale Island, Tristan da Cunha, south Atlantic, March.

Troels Jacobsen/Arcticphoto / Subantarctic Fur Seal (Arctocephals tropicalis) preening its fur. Nightingale Island, part of the Tristan da Cunha, south Atlantic, March.

Troels Jacobsen/Arcticphoto / Subantarctic Fur Seal (Artcocephalus tropicalis) cub sat on rocks. Nightingale Island, part of the Tristan da Cunha group, South Atlantic, March.

Bryan and Cherry Alexander / Antarctic fur seal pup (Arctocephalus gazella) on the beach at Sealers Corner, Heard Island, Sub Antarctica.

Staffan Widstrand / Mimmi Widstrand photographing a young Galapagos Sea Lion (Zalophus wollebaeki) on a beach. Fernandina Island, Punta Espinosa, Galapagos, Ecuador, April. Model released

Frederique Olivier / Close up of front flipper of Southern elephant seal (Mirounga leonina) Macquarie Island, Southern Atlantic, Australian Antarctica, December

Juan Carlos Munoz / South American fur seals (Arctocephalus australis) on rocks. Puerto Deseado, Patagonia, Argentina, March 2008