Uri Golman / Iceberg showing submerged section when viewed from above, Greenland's National Park, Northeast Greenland. August 2015.

Jeff Vanuga / Iceberg from the Weddell Sea in Antarctica, grounded near South Georgia, Antarctica. October 2019.

Erlend Haarberg / Fogbow over sea ice. Fogbows are similar to a rainbow, but produced by very small droplets in fog or cloud, which diffract light, instead of large raindrops which do not, Svalbard, Norway, July.

Danny Green / Polar bear (Ursus maritimus) and cubs feeding on Whale carcass, on iceberg. Svalbard, Norway, July 2018.

Stefan Christmann / Emperor penguin (Aptenodytes forsteri) colony, males huddling whilst incubating eggs. Atka Bay, Antarctica. July. Ocean Photographer of the Year Competition 2021 - Collective Portfolio Award Winner.

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 / Iceberg, Antarctic Peninsula, Antarctica.

Jordi Chias / Gentoo penguins (Pygoscelis papua) swimming together and porpoising in search of krill, Antarctic Peninsula, Antarctica.

Stefan Christmann / Sea ice and iceberg during polar night. Atka Bay, Antarctica. July 2017.

Stefan Christmann / Moon rising over sea ice during polar night. Atka Bay, Antarctica. June 2017.

Stefan Christmann / Emperor penguin (Aptenodytes forsteri) group sliding over sea ice, returning to form breeding colony. Iceberg in background. Atka Bay, Antarctica. April 2017.

Stefan Christmann / Cameraman Lindsay McCrae on sea ice filming frozen landscape and icebergfor BBC Dynasties Penguin programme. Atka Bay, Antarctica. October 2017.

Stefan Christmann / Cameraman Lindsay McCrae filming Emperor penguin (Aptenodytes forsteri) colony for BBC Dynasties Penguin programme. Chicks are on sea ice whilst parents fish at sea. Atka Bay, Antarctica. December 201...

Sven Zacek / Bearded seal (Erignathus barbatus) sunbathing on iceberg broken off from glacier. Kongsfjorden fjord, Spitsbergen, Norway. June 2014.

Franco Banfi / Diver exploring around an iceberg. Tasiilaq, East Greenland. April 2018.

Franco Banfi / Diver exploring an iceberg in Greenland Sea. Tasiilaq, East Greenland. April 2018.

Franco Banfi / Sugar kelp (Saccharina latissima) and Sea anemones (Actiniaria) on rock near iceberg. Tasiilaq, East Greenland. April.

Franco Banfi / Sugar kelp (Saccharina latissima) near iceberg, view upwards to gap in sea ice. Tasiilaq, East Greenland. April.

David Tipling / Snow petrel (Pagadroma nivea nivea) flying around Iceberg off South Georgia, Southern Ocean January

David Tipling / King penguin (Aptenodytes patagonicus) Trollheim South Georgia, January.

Andy Rouse / Iceberg and mountain, Svalbard, Norway. Arctic. July.

Pal Hermansen / Barnacle geese (Branta leucopsis) with goslings, swimming past icebergs, Jokulsarlon, Iceland, June.

Pal Hermansen / Barnacle geese (Branta leucopsis) with goslings, Jokulsarlon ice field, Iceland, June.

Niall Benvie / Jokulsarlon lagoon at dawn with rainbow in the sky. Iceland, October 2015.

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

Brent Stephenson / Sunset off Scott Island, with floating pieces of sea ice, Scott Inlet, Baffin Island, Canadian Arctic, August 2015.

Brent Stephenson / Polar bear (Ursus maritimus) mother and large second year cub swim across calm water, Scott Inlet, Baffin Island, Canadian Arctic, August. Vulnerable species.

Sven Zacek / View through glacier ice towards snow-covered mountains in Kongsfjorden fjord in Svalbard, Norway. June 2015.

Ross Hoddinott / Ice on black volcanic sand beach with waves, Jokulsarlon, Southeast Iceland, February.

Pal Hermansen / Barnacle geese (Branta leucopsis) with goslings, Jokulsarlon ice field, Iceland, June.

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

Klein & Hubert / Chinstrap penguin (Pygoscelis antarcticus) walking with high mountains in background, Antarctica

Klein & Hubert / Chinstrap penguin (Pygoscelis antarcticus) walking with full belly and iceberg in background, Antarctica

Klein & Hubert / Three Emperor penguin (Aptenodytes forsteri) chicks walking on pack ice in front of blue iceberg, Antarctica

Klein & Hubert / Three Emperor penguin (Aptenodytes forsteri) walking in line on pack ice in front of blue iceberg, Antarctica

Michel Roggo / Iceberg in the sea outside the Kangia Ilulissat Icefjord. Iceberg from the Sermeg Kujalleg Glacier, UNESCO World Heritage Site, Kalaallit Nunaat, Greenland, August 2014. Photographed for The Freshwate...

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

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

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

Christophe Courteau / Iceberg, Spitzbergen, Norway, June, 2012.

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

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