Marie Read / Abstract patterns of reflected sky and clouds on the ocean with a silhouetted Red-faced cormorant (Phalarocorax urile) in flight, St. Paul Island, Pribilof Islands, Alaska, USA, July.

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

Jeff Wilson / View through the porthole of science teams and Frozen Planet film crew working on the sea ice in the Bering Sea, Alaska, USA, March 2008. The film crew were in search of Spectacled eider ducks, temper...

Jeff Wilson / Crew member of the US coastguard ship 'Healy' standing on the sea ice in front of the ship's hull after the ship became stuck in the ice, Bering Sea, Alaska, USA, March 2008. Taken on location for the...

Todd Pusser / Dall's porpoise at surface {Phocoenoides dalli}, Central Bering Sea, Alaska

Yva Momatiuk & John Eastcott / Pacific Walrus (Odobenus rosmarus divergens) bull portrait on coastal rocks in haul-out cove, summer, Round Island, Bering Sea, Bristol Bay, Alaska

Pete Oxford / Steller's sealions diving into sea {Eumetopias jubata} Commander Is, Russia

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

Todd Pusser / Killer whale surfacing {Orcinus orca}, Pribilof Islands, Bering Sea, Alaska, USA

Marie Read / Tufted puffins (Fratercula cirrhata) pair flying over ocean pattern of kelp and foam, St. Paul Island, Pribilof Islands, Alaska, USA, July.

Sylvain Cordier / Siberian Yupiks who have killed two walruses returning to their village by boat, Preobrazheniya Bay, Chukotka, Russia.

Ingo Arndt / Horned Puffin (Fratercula corniculata), Round Island, Bristol Bay, Bering Sea, Alaska