Doug Allan / Killer Whales (Orcinus orca) spy-hopping to observe Weddell Seal (Leptonychotes weddellii) in preparation to knock it from the ice by creating a wave. Marguerite Bay, Antarctic Peninsula, summer. Free...

Peter Cairns / Ice fishing on a freshwater lake, Sweden, April 2008

Peter Cairns / Ice fishing on a freshwater lake, Sweden, April 2008

Terry Whittaker / 2020VISION / Grey herons (Ardea cinerea) fighting over food on a frozen lake, Regents Park, London, England, UK, February

Terry Whittaker / 2020VISION / Grey herons (Ardea cinerea) fighting over food on a frozen lake, Regents Park, London, England, UK, February

Steven Kazlowski / Arctic fox (Alopex lagopus) sits upon and feeds on a Bowhead whale (Balaena mysticetus) jawbone, Barter Island, Alaska, USA, November

Juergen Freund / Fresh frozen shrimps straight from the freezer compartment of a shrimp trawler, with boxed shrimps ready for pick-up or delivery. Indonesia, July 2009.

Diane McAllister / American mink (mustela vison) standing on a frozen pond while searching for food. USA, February

Bryan and Cherry Alexander / Fur clad Inuit hunters cutting frozen meat with axe. Northwest Greenland, 1980.

Bryan and Cherry Alexander / Inuit hunter chopping frozen Walrus (Odobenus rosmarus) meat to feed to Huskies (Canis familiaris) on hunting trip. Northwest Greenland, 1980.

Neil Lucas / Food supplies (wholemeal biscuits) in interior of Shackleton's Nimrod Hut, frozen in time from the British Antarctic Expedition 1907, Cape Royds, McMurdo Sound, Antarctica, November 2008

Neil Lucas / Food supplies (cocoa) in wooden packing cases in interior of Shackleton's Nimrod Hut, frozen in time from the British Antarctic Expedition 1907, Cape Royds, McMurdo Sound, Antarctica, November 2008

Neil Lucas / Food supplies in wooden packing cases in interior of Shackleton's Nimrod Hut, frozen in time from the British Antarctic Expedition 1907, Cape Royds, McMurdo Sound, Antarctica, November 2008

Neil Lucas / Food supplies (salt) in interior of Shackleton's Nimrod Hut, frozen in time from the British Antarctic Expedition 1907, Cape Royds, McMurdo Sound, Antarctica, November 2008

Neil Lucas / Food supplies (meat) in interior of Shackleton's Nimrod Hut, frozen in time from the British Antarctic Expedition 1907, Cape Royds, McMurdo Sound, Antarctica, November 2008

Neil Lucas / Food supplies (powdered egg and golden syrup) in interior of Shackleton's Nimrod Hut, frozen in time from the British Antarctic Expedition 1907, Cape Royds, McMurdo Sound, Antarctica, November 2008

Neil Lucas / Food supplies (meat) in interior of Shackleton's Nimrod Hut, frozen in time from the British Antarctic Expedition 1907, Cape Royds, McMurdo Sound, Antarctica, November 2008

Neil Lucas / Food supplies (meat) in interior of Shackleton's Nimrod Hut, frozen in time from the British Antarctic Expedition 1907, Cape Royds, McMurdo Sound, Antarctica, November 2008

Dietmar Nill / Two juvenile White-tailed sea eagles (Haliaeetus albicilla), fighing over a fish on a frozen lake, Feldberger Seenlandschaft, Germany

Mark Brownlow / Local man showing the traditional winter way to fish for food through hole in ice in Lake Baikal, world's deepest and oldest (and largest by volume) freshwater lake, Siberia, Russia. BBC Planet Earth...

Doug Allan / Inuit camp on spring sea ice, Admiralty Inlet, Baffin Island, Canadian Arctic, NW Territories

Martha Holmes / Frozen Blue fin tuna at Tsukiji fish market, Tokyo, Japan

Martha Holmes / Unloading Frozen Blue fin tuna at Tsukiji fish market, Tokyo, Japan

Bengt Lundberg / Traditional method of fishing through ice, Sweden

Karl Ammann / Chimpanzee (Pan troglodytes) meat for sale in shop, Central Africa.

Eric Baccega / Fisherman collecting fish with a net from ice hole on frozen Baikal lake in winter, Siberia, Russia, March 2001