Brent Stephenson / Type B Killer whale (Orca orcinus) surfacing, close-up, Antarctic Sound, Antarctic Peninsula, Antarctic, January.

Brent Stephenson / Humpback whale (Megaptera novaeangliae) surfacing whilst lunge-feeding, showing the extended throat pleats, Neko Harbour, Antarctic Peninsula, Antarctica, January.

Tui De Roy / Adelie penguin (Pygoscelis adeliae) courtship behaviour. Prydz Bay, near Davis Station, Vestfold Hills, Ingrid Christensen Coast, East Antarctica, November.

Tui De Roy / Emperor penguin (Aptenodytes forsteri) chicks, Amanda Bay, Prydz Bay, Ingrid Christensen Coast, East Antarctica, November.

Chris & Monique Fallows / Wandering albatross (Diomedea exulans) flying off coast of South Georgia Island.

Chris & Monique Fallows / Wandering albatross (Diomedea exulans), engaged in mating. South Georgia Island, Southern Ocean.

Chris & Monique Fallows / Wandering albatross (Diomedea exulans), engaged in mating display. South Georgia Island, Southern Ocean.

Chris & Monique Fallows / King penguin (Aptenodytes patagonicus) colony with storm approaching. Grytviken, South Georgia Island.

Chris & Monique Fallows / King penguin (Aptenodytes patagonicus) and Southern elephant seal (Mirounga leonina) colony at sunrise. Grytviken, South Georgia Island.

Chris & Monique Fallows / Wandering albatross (Diomedea exulans), engaged in mating display. South Georgia Island, Southern Ocean.

Chris & Monique Fallows / Wandering albatross (Diomedea exulans), in flight over South Georgia Island, Southern Ocean.

Chris & Monique Fallows / Wandering albatross (Diomedea exulans) flying off coast of South Georgia Island. Silhouetted.

Chris & Monique Fallows / King penguin (Aptenodytes patagonicus) group on ice preparing to dive. South Georgia Island.

Chris & Monique Fallows / Wandering albatross (Diomedea exulans), feeding and cleaning.

Fred Olivier / Adelie penguins (Pygoscelis adeliae) in front of French Icebreaker L'Astrolabe, on edge of the fast ice off Dumont D'Urville station, Antarctica. December 2014.

Charlie Summers / Adelie Penguin (Pygoscelis adeliae) carrying stolen rock from another nest in rookery, Peterman Island, Antarctica, November.

Jordi Chias / Atolla jellyfish (Atolla wyvillei) with Gentoo penguin (Pygoscelis papua) in the background near the surface. Antarctic Peninsula. Finalist in the Underwater category of the Wildlife Photographer of t...

Andy Rouse / Chinstrap penguin (Pygoscelis antarcticus) group on blue iceberg, Antarctica

Chris & Monique Fallows / Wandering albatross (Diomedea exulans), engaged in mating display. South Georgia Island, Southern Ocean.

Chris & Monique Fallows / Wandering albatross (Diomedea exulans), engaged in mating display. South Georgia Island, Southern Ocean.

Chris & Monique Fallows / Wandering albatross (Diomedea exulans), engaged in mating display. South Georgia Island, Southern Ocean.

Chris & Monique Fallows / King penguin (Aptenodytes patagonicus) colony at sunrise. Grytviken, South Georgia Island.

Chris & Monique Fallows / Wandering albatross (Diomedea exulans), engaged in mating display. South Georgia Island, Southern Ocean.

Chris & Monique Fallows / Wandering albatross (Diomedea exulans), engaged in mating display. South Georgia Island, Southern Ocean.

Chris & Monique Fallows / Wandering albatross (Diomedea exulans), engaged in mating display. South Georgia Island, Southern Ocean.

Chris & Monique Fallows / Wandering albatross (Diomedea exulans), feeding and cleaning.

Chris & Monique Fallows / Wandering albatross (Diomedea exulans), engaged in mating display. South Georgia Island, Southern Ocean.

Chris & Monique Fallows / Wandering albatross (Diomedea exulans), feeding and cleaning.

Chris & Monique Fallows / Wandering albatross, (Diomedea exulans), fighting for fish scraps.

Chris & Monique Fallows / Wandering albatross (Diomedea exulans), feeding and cleaning.

Chris & Monique Fallows / Wandering albatross (Diomedea exulans), engaged in mating display. South Georgia Island, Southern Ocean.

Ole Jorgen Liodden / Gentoo penguin (Pygoscelis papua) alone on blue ice, Antarctica, March.

Fred Olivier / Adelie penguins (Pygoscelis adeliae) travelling to the ice edge to feed, Antarctica.

Fred Olivier / Adelie penguins (Pygoscelis adeliae) preening at edge of ice, Antarctica.

Fred Olivier / Adelie penguins (Pygoscelis adeliae) wide angle portrait of two with larger group in background, Antarctica.

Fred Olivier / Adelie penguin (Pygoscelis adeliae) group, Antarctica.

Bryan and Cherry Alexander / Emperor penguins (Aptenodytes forsteri) colony, with Snow petrel (Pagodroma nivea) flying past and dark sky. Atka Bay. Antarctica

Bryan and Cherry Alexander / Chinstrap penguins (Pygoscelis antarctica) on a blue iceberg, with Antarctic Prion (Pachyptila desolata) flying over. Antarctica

Bryan and Cherry Alexander / Icicles hanging from the edge of a small blue iceberg as the summer thaw sets in, Antarctica

Chris & Monique Fallows / Gentoo penguins (Pygoscelis papua) diving into the ocean, Antarctic peninsula, Antarctica.

Chris & Monique Fallows / Sooty Albatros (Phoebetria fusca) at sea off South Georgia Island, Antarctica

Chris & Monique Fallows / King penguin chicks (Aptenodytes patagonicus) South Georgia Island, Antarctica

Suzi Eszterhas / Adelie Penguins (Pygoscelis adeliae) on iceberg, Paulet Island, Antarctica

Suzi Eszterhas / Adelie Penguin (Pygoscelis adeliae) jumping out of sea onto iceberg with other penguins, Paulet Island, Antarctica

Suzi Eszterhas / Adelie Penguin (Pygoscelis adeliae) jumping off iceberg, Paulet Island, Antarctica

Enrique Lopez-Tapia,Enrique Lopez-Tapia / Gentoo penguin (Pygoscelis papua) and Antarctic cruise liner 'MV Ushuaia' in Neko Harbour, Andvord Bay. Antarctic Peninsula, Antarctica

Enrique Lopez-Tapia / Tourists on a zodiac going past icebergs in Iceberg Alley, Pleneau Island, Antarctica

Enrique Lopez-Tapia / Gentoo penguins (Pygoscelis papua) calling, Cuverville Island. Antarctic Peninsula, Antarctica

Ben Cranke,Ben Cranke / Leopard seal (Hydrurga leptonyx) hunting Gentoo Penguin (Pygoscelis papua) into shore, Cuverville Island, Antarctic Peninsula, Antarctica

Ben Cranke / Leopard seal (Hydrurga leptonyx) chasing Gentoo Penguin (Pygoscelis papua) into shore, Cuverville Island, Antarctic Peninsula, Antarctica

Ben Cranke,Ben Cranke / Gentoo Penguin (Pygoscelis papua) jumping out of the sea, Cuverville Island, Antarctic Peninsula, Antarctica. Highly commended in the Single Species Portfolio of the Terre Sauvage Nature Images Awards...

Ben Cranke / Gentoo Penguin (Pygoscelis papua) jumping onto shore, Cuverville Island, Antarctic Peninsula, Antacrtica

Ben Cranke,Ben Cranke / Gentoo Penguin (Pygoscelis papua) coming in from the sea, Cuverville Island, Antarctic Peninsula, Antarctica

Ben Cranke / Gentoo Penguins (Pygoscelis papua) jumping across rocky shore, Cuverville Island, Antarctic Peninsula, Antarctica

Ben Cranke,Ben Cranke / Gentoo Penguin (Pygoscelis papua) group travelling out to sea, Cuverville Island, Antarctic Peninsula, Antarctica

Ben Cranke,Ben Cranke / Gentoo Penguin (Pygoscelis papua) nest amongst the buildings at Port Lockroy, Wiencke Island, Antarctic Peninsula, Antarctica

Ben Cranke,Ben Cranke / Gentoo Penguin (Pygoscelis papua) penguins rest on a floating iceberg, Antarctic Peninsula, Antarctica

Ben Cranke / Gentoo Penguin (Pygoscelis papua) nesting, Petermann Island, Antarctic Peninsula, Antarctica

Barrie Britton,Barrie Britton / King Penguin (Aptenodytes patagonicus) colony, with mountains reflected in the ocean, St Andrew's Bay, South Georgia. Photograph taken on location for the BBC Frozen Planet series, October 2009.

Barrie Britton,Barrie Britton / Southern Giant Petrel (Macronectes giganteus), St Andrew's Bay, South Georgia. Photograph taken on location for the BBC Frozen Planet series, October 2009.

David Tipling / Emperor Penguin (Aptenodytes forsteri) walking across the sea ice of Weddell Sea, near Snow Hill Island, Antarctica, November

David Tipling / Kapitan Klebnikov, an ice breaker, growing through ice in the Weddell Sea near Snow Hill Island, Antarctica, November 2006

David Tipling / Emperor Penguins on sea ice with Kaptan Klebnikov ice breaker in background, Snow Hill Island, Antarctica, November

David Tipling / Emperor Penguins, (Aptenodytes forsteri), Weddell Sea, Antarctica

David Tipling / Person in purple coat photographing Emperor Penguins (Aptenodytes forsteri) at the Dawson-Lambton Glacier, Weddell Sea, Antarctica. No release available.

David Tipling / Emperor Penguins, (Aptenodytes forsteri), young huddling together to form a creche to keep warm, during storm, Dawson Lambton Glacier, Weddell Sea, Antarctica

David Tipling / Emperor Penguin, (Aptenodytes forsteri) with chick, Weddell Sea, Antarctica, November

David Tipling / King Penguin, (Aptenodytes patagonicus) standing on beach, St Andrews Bay, South Georgia, January

David Tipling / Tents in a storm with 75 mile per hour winds, at Patriot Hills, Antarctica

David Tipling / King Penguin (Aptenodytes patagonicus) colony with chicks, Gold Harbour, South Georgia, November

David Tipling / Tourist photographing King Penguins (Aptenodytes patagonicus) Fortuna Bay, South Georgia, November 2006. No release available.

David Tipling / King Penguin, (Aptenodytes patagonicus), St Andrews Bay, South Georgia, January

David Tipling / King Penguins (Aptenodytes patagonicus) on beach, Gold Harbour, South Georgia, November

David Tipling / Chinstrap Penguins (Pygoscelis antarcticus) on blue iceberg, Antarctica

David Tipling / Gentoo Penguins (Pygoscelis papua) about to enter the sea, Brown Bluff Antarctic Peninsula, Antarctica, November

David Tipling / King Penguins (Aptenodytes patagonicus) group huddled together in blizzard, Right Whale Bay, South Georgia, November

David Tipling / King Penguins (Aptenodytes patagonicus) group huddled together in storm, Right Whale Bay, South Georgia, November

Jeff Vanuga / Gentoo Penguin (Pygoscelis papua) mating. Cuverville Island, Antarctica.

Mark Carwardine / Three Gentoo Penguins (Pygoscelis papua) standing at the edge of sea ice. Antarctic Peninsula, January. Book plate from Mark Carwardine's Ultimate Wildlife Experiences.

Mark Carwardine / Chinstrap Penguins (Pygoscelis antarcticus) standing on ice. South Shetland Islands, Antarctica, January. Book plate from Mark Carwardine's Ultimate Wildlife Experiences.

Mark Carwardine / Tourists in zodiac looking at icebergs. Antarctic Peninsula, January.

Martha Holmes / Edge of large piece of ice sheet drifting in sea. Antarctic Peninsula. February 2008.

Konrad Wothe / Wooden hut of the polar explorer Sir Wally Herbert which was dismantled and transported to the Falkland island Museum, Port Stanley, Falkland Islands, South Atlantic Ocean. No release available.

Ole Jorgen Liodden / Royal Penguin (Eudyptes schlegeli) diving underwater near Macquarie Island, Sub-Antarctica, Australia. Highly commended, GDT competition 2012.

Enrique Lopez-Tapia / Leopard seal (Hydrurga leptonyx) resting on iceberg, Gerlache Strait, Antarctic Peninsula, Antarctica, March 2010. WINNER OF NATURE CATEGORY OF POLLUX COMPEITITON / AWARDS 2013

Chadden Hunter / Brinicles (brine icicles or ice stalactites) forming under the ice, growing towards the sea floor, Ross Sea, McMurdo Sound, Antarctica. Taken on location for 'Winter' episode of the BBC Frozen Planet...

Brent Stephenson / Gentoo Penguin (Pygoscelis papua) with two large chicks. The chicks are begging to be fed by the adult. Petermann Island, Antarctic Peninsula, Antarctica, January.

Brent Stephenson / Gentoo Penguins (Pygoscelis papua) porpoising on the way back to the breeding colony. Port Lockroy, Antarctic Peninsula, Antarctica, January.

Brent Stephenson / Flock of Cape petrels (Daption capense capense) in flight against the sea. Against the sun. South Shetland Islands, Antarctica, January.

Brent Stephenson / Waves crashing on a massive iceberg. Drake Passage, near the South Shetland Islands, Antarctica, January.

Brent Stephenson / A rough and windy day in the Drake Passage with Force 9+ beaufort scale conditions. Drake Passage, South Atlantic, January.

Brent Stephenson / Wilson's Storm-petrel (Oceanites oceanicus) hovering whilst feeding in calm conditions. Cuverville Island, Antarctic Peninsula, Antarctica, December.

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

Brent Stephenson / Columnar basalt formations at the 180 metre high Edinburgh Hill. Zodiac full of cruise ship tourists for scale. South Shetland Islands, Antarctica, December.

Brent Stephenson / Flock of Cape Petrels (Daption capense capense) in flight, heading away against the sky. South Shetland Islands, Antarctica, December.

Brent Stephenson / A large hole in an iceberg with icicles hanging. Yalour Islands, Antarctic Peninsula, Antarctica, December.