Bernard Castelein / Chaffinch (Fringilla coelebs) drinking from small gap in ice, Brasschaat, Belgium, January.

Steven Kazlowski / Young Polar bear (Ursus maritimus) standing and trying to balance in shallow water along the Bernard Spit, 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, Oc...

Steven Kazlowski / Young Polar bear (Ursus maritimus) standing and trying to balance in shallow water along the Bernard Spit, 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, Oc...

Steven Kazlowski / Young Polar bear (Ursus maritimus) standing and trying to balance in shallow water along the Bernard Spit, 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, Oc...

Steven Kazlowski / Two curious young Polar bears (Ursus maritimus), Barter Island, off the 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, October 2011

Andy Rouse / Polar Bear (Ursus maritimus) portrait in sea-ice landscape. Wide angle / fish-eye shot. Svalbard, Norway, September.

Steven Kazlowski / Polar bear (Ursus maritimus) on sea ice, off the coast of Svalbard, Norway

Diane McAllister / Polar bears (Ursus maritimus) fighting in water. Beaufort Sea , Kaktovik, Alaska, USA. Highly commended in the Polar Passion category of the Nature's Best Photography Competition 2019.

Danny Green / Polar bear (Ursus maritimus) walking across sea ice, reflected in water. Svalbard, Norway, July.

Danny Green / Polar bear (Ursus maritimus) and cubs, standing on sea ice. Svalbard, Norway, July.

Danny Green / Polar bear (Ursus maritimus) and cubs resting on sea ice. Svalbard, Norway, July.

Danny Green / Polar bear (Ursus maritimus) female and cubs, one cub walking up slope of ice in foreground. Svalbard, Norway, July.

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

Danny Green / Ringed seal (Pusa hispida) and pup resting on ice. Svalbard, Norway. April.

Danny Green / Polar bear (Ursus maritimus) resting on sea ice, view from above. Svalbard, Norway, June 2018.

Danny Green / Polar bear (Ursus maritimus) hunting Seal on sea ice. Svalbard, Norway, July 2018.

Danny Green / Polar bear (Ursus maritimus), two cubs playing, leaping across sea ice, reflected in water. Svalbard, Norway, July.

Danny Green / Polar bear (Ursus maritimus), two cubs walking on sea ice. Svalbard, Norway, July.

Danny Green / Ringed seal (Pusa hispida) resting on ice, reflected in water. Svalbard, Norway. July.

Alex Mustard / Killer whales (Orcinus orca) at the surface in an Arctic fjord in Spildra, northern Norway, with sea birds. Arctic Ocean

Espen Bergersen / Aerial shot of a fishing boat catching Atlantic herring (Clupea harenguis), with Killer whales (Orcinus orca) and Humpback whales (Megaptera novaeangliae) swimming around the boat and large numbers of...

Espen Bergersen / Aerial shot of a fishing boat catching Atlantic herring (Clupea harenguis), with Killer whales (Orcinus orca) and Humpback whales (Megaptera novaeangliae) swimming around the boats and large numbers o...

Espen Bergersen / Aerial shot of fishing boats catching Atlantic herring (Clupea harenguis), with Killer whales (Orcinus orca) swimming around the boats, Troms, Norway, January.

Espen Bergersen / Aerial shot of two Killer whales (Orcinus orca) swimming inside a shoal of Atlantic herring (Clupea harenguis), hunting, with one Killer whale tail slapping to stun the Herring, Sommaroy, Troms, Norwa...

Espen Bergersen / Aerial shot of two Killer whales (Orcinus orca) swimming into a huge shoal of Atlantic herring (Clupea harenguis), hunting, Sommaroy, Troms, Norway, January.

Espen Bergersen / Aerial shot of two Killer whales (Orcinus orca) swimming near to a huge shoal of Atlantic herring (Clupea harenguis), hunting, Sommaroy, Troms, Norway, January.

Espen Bergersen / Aerial shot of two Killer whales (Orcinus orca) swimming inside a shoal of Atlantic herring (Clupea harenguis), hunting, Sommaroy, Troms, Norway, January.

Espen Bergersen / Aerial shot of two Killer whales (Orcinus orca) swimming inside a large shoal of Atlantic herring (Clupea harenguis), hunting, Sommaroy, Troms, Norway, January.

Espen Bergersen / Aerial shot of a huge shoal of Atlantic herring (Clupea harenguis), with a Humpback whale (Megaptera novaeangliae) nearby, Sommaroy, Troms. Norway, January.

Espen Bergersen / Aerial shot of a Killer whale (Orcinus orca) spyhopping several times close to land, with people watching and taking pictures, Sommaroy, Troms. Norway, January.

Espen Bergersen / Aerial shot of three Killer whales (Orcinus orca) swimming close to the surface, Troms, Norway, August.

Espen Bergersen / Aerial shot of Killer whales (Orcinus orca) near the surface, showing mating behaviour including a male Killer whale displaying penis, Troms, Norway, August.

Espen Bergersen / Aerial shot of Killer whales (Orcinus orca) near the surface, showing mating behaviour, Troms, Norway, August.

Espen Bergersen / Aerial shot of a fishing boat with net full of Atlantic herring (Clupea harengus), with Killer whales (Orcinus orca) swimming around the outside, Skjervoy, Troms, Norway, November.

Espen Bergersen / Aerial shot of Killer whale (Orcinus orca) hunting Atlantic herring (Clupea harengus), Troms, Norway, October.

Espen Bergersen / Aerial shot of a pod of Killer whales (Orcinus orca) swimming near the surface, Troms, Norway, October.

Espen Bergersen / Aerial shot of five Humpback whales (Megaptera novaeangliae) lunge feeding in a shoal of Atlantic herring (Clupea harengus) with some fish jumping out of the water, Troms, Norway, January.

Espen Bergersen / Aerial shot of a group of Humpback whales (Megaptera novaeangliae) lunge feeding in a shoal of Atlantic herring (Clupea harengus) with some fish jumping out of the water, one whale creating a bubble n...

Espen Bergersen / Aerial shot of five Humpback whales (Megaptera novaeangliae) lunge feeding in a shoal of Atlantic herring (Clupea harengus) with some fish jumping out of the water, Troms, Norway, January.

Espen Bergersen / Aerial shot of Humpback whales (Megaptera novaeangliae) lunge feeding in a shoal of Atlantic herring (Clupea harengus), Troms, Norway, January.

Espen Bergersen / Aerial shot of four Humpback whales (Megaptera novaeangliae) lunge feeding in a shoal of Atlantic herring (Clupea harengus) with some fish jumping out of the water, Troms, Norway, January.

Espen Bergersen / Aerial shot of four Humpback whales (Megaptera novaeangliae) lunge feeding in a shoal of Atlantic herring (Clupea harengus) with some fish jumping out of the water, Troms, Norway, January.

Espen Bergersen / Aerial shot of three Humpback whales (Megaptera novaeangliae) swimming into a shoal of Atlantic herring (Clupea harengus), preparing to lunge feed, Troms, Norway, January.

Espen Bergersen / Aerial shot of four Humpback whales (Megaptera novaeangliae) lunge feeding in a shoal of Atlantic herring (Clupea harengus) with some fish jumping out of the water, Troms, Norway, January.

Espen Bergersen / Aerial shot of four Humpback whales (Megaptera novaeangliae) swimming near to a shoal of Atlantic herring (Clupea harengus), Troms, Norway, January.

Espen Bergersen / Aerial shot of four Humpback whales (Megaptera novaeangliae) lunge feeding in a shoal of Atlantic herring (Clupea harengus) with some fish jumping out of the water, Troms, Norway, January.

Espen Bergersen / Aerial shot of a Humpback whale (Megaptera novaeangliae) swimming showing belly, Troms, Norway, January.

Espen Bergersen / Aerial shot of a Humpback whale (Megaptera novaeangliae) showing belly and blowing, Troms, Norway, January.

Espen Bergersen / Aerial shot of a Humpback whale (Megaptera novaeangliae) diving and showing tail fluke, Troms, Norway, January.

Espen Bergersen / Aerial shot of a large group of Humpback whales (Megaptera novaeangliae), Troms, Norway, January.

Espen Bergersen / Aerial shot of a large group of Humpback whales (Megaptera novaeangliae), Troms, Norway, January.

Espen Bergersen / Aerial shot of two Humpback whales (Megaptera novaeangliae) coming to the surface to breathe, Sommaroy, Troms, Norway, January.

Espen Bergersen / Aerial shot of a group of Killer whales (Orcinus orca) tail slapping, shot pans to the right, Skjervoy, Troms, Norway, November.

Espen Bergersen / Aerial shot of Killer whale (Orcinus orca) carousel feeding close to Tromvik harbour, Troms, Norway, December.

Espen Bergersen / Aerial shot of Killer whale (Orcinus orca) hunting Atlantic herring (Clupea harengus) using carousel feeding, with herring jumping out of the water and gulls (Larus) circling above, Tromvik, Troms, No...

Espen Bergersen / Aerial shot of a female Humpback whale (Megaptera novaeangliae) and calf surrounded by Killer whales (Orcinus orca), mother hits sideways with her tail fluke to drive Killer whales away, Skjervoy, Tro...

Espen Bergersen / Aerial shot of two Killer whales (Orcinus orca) spyhopping, with a snowy landscape in the background, Skjervoy, Troms, Norway, December.

Espen Bergersen / Aerial shot of a small pod of Killer whales (Orcinus orca) at surface, with snowy landscape in the background, Skjervoy, Troms, Norway, December.

Espen Bergersen / Aerial shot of a pod of Killer whales (Orcinus orca) carousel feeding, Skjervoy, Troms, Norway, November.

Espen Bergersen / Aerial shot of a pod of Killer whales (Orcinus orca) carousel feeding, Skjervoy, Troms, Norway, November.

Espen Bergersen / Aerial shot of a pod of Killer whales (Orcinus orca) carousel feeding, drone moving closer, Skjervoy, Troms, Norway, November.

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

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.

Franco Banfi / Diver exploring around an iceberg. Tasiilaq, East Greenland. April, 2018. Ocean Photographer of the Year 2023 - Third place Adventure category.

Terry Whittaker / Pod of Killer whales (Orcinus orca) at surface, Grundarfjordur, Iceland, March.

Terry Whittaker / Slow motion close-up of a large group of Fulmars (Fulmarus glacialis) feeding from a fish processing plant outfall, Grundafjordur, Iceland, March.

Francois Savigny / Polar bear and cub asleep on drifting iceberg, summer, Svalbard, Norway

Eric Baccega / Polar bear (Ursus maritimus) swimming in front of an iceberg, Arctic Bay, Baffin Island, Nunavut, Canada, June.

Eric Baccega / Narwhal (Monodon monoceros) at the sea surface. Baffin Island, Nunavut, Canada, June.

Ann & Steve Toon / Arctic tern (Sterna paradisaea) with sandeel. Inner Farne, Northumberland, UK. July.

Pal Hermansen / One-year ice off Ellesmere island, Nunavut, Canada, August.

Benjamin Barthelemy / Long exposure of tidal water flowing off rocks, with the Okshornan Mountains in the background, Isle of Senja, Troms, Norway, February 2015.

Wild Wonders of Europe / Widstrand / Humpback whale (Megaptera novaeangliae) tail fluke above water before diving, Senja, Troms County, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed on the large numbers of sp...

Wild Wonders of Europe / Widstrand / Humpback whale (Megaptera novaeangliae) tail fluke above water before diving, Senja, Troms County, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed on the large numbers of sp...

Wild Wonders of Europe / Widstrand / Orca / Killer whale (Orcinus orca) surfacing, Senja, Troms County, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed on the large numbers of spawning Herring fish

Wild Wonders of Europe / Widstrand / Dorsal fin of Orca / Killer whale (Orcinus orca) surfacing, Senja, Troms County, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed on the large numbers of spawning Herring fis...

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.

Brent Stephenson / Young Polar bear (Ursus maritimus) walking across melting sea ice, Scott Inlet, Baffin Island, Canadian Arctic, August. Vulnerable species.

Ben Hall / Orcas (Orcinus orca) pair in sea surrounded by mountains, Iceland, January.

Ben Hall / Orca (Orcinus orca) swimming in sea surrounded by mountains at sunset, Iceland, January.

Ole Jorgen Liodden / Polar bear (Ursus maritimus) standing on ice floe, looking at camera. Svalbard, Norway. August.

Sven Zacek / Walruses (Odobenus rosmarus) fighting over a resting place on snow, Magdalenefjorden Fjord, Svalbard, Spitsbergen, Norway, June.

Sven Zacek / Walrus (Odobenus rosmarus) swimming towards a camera, Magdalenefjorden Fjord, Svalbard, Spitsbergen, Norway. June.

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

Franco Banfi / Walrus (Odobenus rosmarus) two swimming underwater, Spitsbergen, Svalbard Archipelago, Norway, Arctic Ocean. July.

Franco Banfi / Walrus (Odobenus rosmarus) two swimming underwater, Spitsbergen, Svalbard Archipelago, Norway, Arctic Ocean. July.

Franco Banfi / Walrus (Odobenus rosmarus) swimming underwater, Spitsbergen, Svalbard Archipelago, Norway, Arctic Ocean. July.

Franco Banfi / Walrus (Odobenus rosmarus) Spitsbergen, Svalbard Archipelago, Norway, Arctic Ocean. July.

Franco Banfi / Walrus (Odobenus rosmarus) hauled out in shallow water, Spitsbergen, Svalbard Archipelago, Norway, Arctic Ocean. July.

Franco Banfi / Walrus (Odobenus rosmarus) male and female, hauled out in shallow water, Spitsbergen, Svalbard Archipelago, Norway, Arctic Ocean. July.

Staffan Widstrand / Bearded seal (Erignathus barbatus) hauled out on ice, Spitsbergen, Svalbard, Norway, September.

Staffan Widstrand / Atlantic Walrus (Odobenus rosmarus) at surface, Svalbard, Norway, Arctic, September

Ernie Janes / Fulmar (Fulmaris glacialis) in flight with Hunstanton, Norfolk, England, UK, February.

Ole Jorgen Liodden / Polar bear (Ursus maritimus) waving standing on hind legs with paws raised, Svalbard, Norway, September.