Pascal Kobeh / Scalloped hammerhead (Sphyrna lewini), Cocos Island , Costa Rica. Pacific Ocean.

Pascal Kobeh / Female humpback whale (Megaptera novaeangliae) with its very young calf at the surface, Rurutu island, Australs Archipelago, French Polynesia. Pacific Ocean.

Pascal Kobeh / Female Humpback whale (Megaptera novaeangliae) with its calf in open water, Reunion Island. Indian Ocean.

Pascal Kobeh / Marine iguana (Amblyrhynchus cristatus) swimming back to the surface, Galapagos. Pacific ocean.

Pascal Kobeh / Group of California sea lions (Zalophus californianus) swimming in kelp forest (Macrocystis pyrifera), California, USA. Pacific ocean.

Pascal Kobeh / Group of California sea lions (Zalophus californianus) in a kelp forest (Macrocystis pyrifera), California, USA. Pacific ocean.

Pascal Kobeh / Short-finned pilot whale (Globicephala macrorhynchus) close to the surface, Costa Rica. Pacific ocean.

Pascal Kobeh / Great white shark (Carcharodon carcharias) in open water, Guadalupe island, Mexico. Pacific Ocean.

Pascal Kobeh / Group of Short-finned pilot whales (Globicephala macrorhynchus) in open water, maybe the whole family with the male, the female and the calves, Costa Rica. Pacific ocean.

Pascal Kobeh / Group of Short-finned pilot whales (Globicephala macrorhynchus) swimming down into deep water, Costa Rica. Pacific ocean.

Pascal Kobeh / Aggregation of thousands of Spider crabs (Leptomithrax gaimardii) for moulting, South Australia Basin, Australia. Pacific Ocean.

Pascal Kobeh / Aggregation of thousands of Spider crabs (Leptomithrax gaimardii) for moulting, South Australia Basin, Australia. Pacific Ocean.

Olga Kamenskaya / Diver with Baikal sponges (Lubomirskia baicalensis). Lake Baikal, Russia, March 2007. Model released.

Pascal Kobeh / Orcas / killer whales (Orcinus orca) swimming in open water, Three Kings Islands, New Zealand. Pacific Ocean.

Richard Robinson / Maui's dolphins (Cephalorhynchus hectori maui) Critically Endangered, the world's smallest and rarest marine dolphin. Endemic to North Island, New Zealand, March. Editorial use only.

Richard Robinson / Maui's dolphin (Cephalorhynchus hectori maui) Critically Endangered, the world's smallest and rarest marine dolphin. Endemic to North Island, New Zealand. October. Editorial use only.

Richard Robinson / Hector's dolphin (Cephalorhynchus hectori) Akaroa Harbour, South Island, New Zealand, November. Editorial use only.

Richard Robinson / Hector's dolphins (Cephalorhynchus hectori) Akaroa Harbour, South Island, New Zealand, November. Editorial use only.

Ben Cranke / Fin whale (Balaenoptera physalus) surfacing with mountain landscape, Liefdefjorden, Svalbard, Norway. July 2011.

Olga Kamenskaya / Young Baikal seal (Pusa sibirica) at breathing hole. Lake Baikal, Russia, April.

Olga Kamenskaya / Young Baikal seal (Pusa sibirica) at breathing hole. Lake Baikal, Russia, April.

Ben Cranke / Walrus (Odobenus rosmarus) portrait, Svalbard, Norway. July.

Olga Kamenskaya / Baikal seals (Pusa sibirica) hauled out on rock. Endemic to Lake Baikal. Russia, May.

Sven Zacek / Roe deer (Capreolus capreolus) buck with does, Vesneri, Estonia, March. Winner of the Animal stories portfolio in the Melvita Nature Images Awards competition 2014.

Sven Zacek / Roe deer (Capreolus capreolus) buck, Vesneri, Estonia, March. Winner of the Animal stories portfolio in the Melvita Nature Images Awards competition 2014.

Sven Zacek / Roe deer (Capreolus capreolus) in the snow, two running away towards a third facing the camera, Vorumaa, Estonia, January. Winner of the Animal stories portfolio in the Melvita Nature Images Awards co...

Sven Zacek / Two Roe deer (Capreolus capreolus) sniffing each other in the snow, Vorumaa, Estonia, January. Winner of the Animal stories portfolio in the Melvita Nature Images Awards competition 2014.

Sven Zacek / Roe deer (Capreolus capreolus) in fog at sunset, Estonia, September. Nominated in the Melvita Nature Images Awards competition 2014.

Radomir Jakubowski / Chamois (Rupicapra rupicapra) jumping, Vosges Mountains, France. Nominated in the Melvita Nature Images Awards competition 2014.

Ben Cranke / American Bison (Bison bison) foraging in the snow, Yellowstone National Park, Wyoming, USA. January.

Ben Cranke / Coyote (Canis latrans) in the snow, Yellowstone National Park, Wyoming, USA. January.

Ben Cranke / Red fox (Vulpes vulpes) in snow, Yellowstone National Park, Wyoming, USA. Wyoming, USA, January.

Ben Cranke / Eurasian red squirrel (Sciurus vulgaris) sitting on tree branch, Finland. February.

Ben Cranke / Steller's Sea Eagle (Haliaeetus pelagicus) in flight, Hokkaido, Japan. February.

Ben Cranke / Steller's Sea Eagle (Haliaeetus pelagicus) portrait, Hokkaido, Japan. February.

Ben Cranke / Steller's Sea Eagle (Haliaeetus pelagicus) stood on ice floe, Hokkaido, Japan. February.

Ben Cranke / Golden Eagle (Aquila chrysaetos) in flight, Finland. February.

Ben Cranke / European Herring Gull (Larus argentatus) landing on the waters of a fjord, Norway, May.

Ben Cranke / European Herring Gull (Larus argentatus) taking off, Norway, May.

Ben Cranke / European Herring Gulls (Larus argentatus) in flight at sunset Norway, May.

Matthew Maran / Mute swans (Cygnus olor) Highgate Ponds, Hampstead Heath, London, UK, February.

Ben Cranke / Arctic Redpoll (Carduelis hornemanni) perched on frosty plant, Finland. February.

Ben Cranke / Conifer tree bending over under weight of snow, Kuusamo, Finland. February 2011.

Matthew Maran / Sunset over snow-covered Hampstead Heath in winter, London, UK, January 2013.

Matthew Maran / Lime trees (Tilia sp) and benches in snow, Kenwood Estate, London, UK, January 2013.

Matthew Maran / Oak tree (Quercus robur) in snow, Hampstead Heath, London, UK, January 2013.

Ross Hoddinott / The Northern Lights / Aurora Borealis over a river, Vik, Iceland. February 2014.

Olga Kamenskaya / Ice formations on Lake Baikal, Siberia, Russia, March 2007.