A leopard seal feeds Paul Nicklen a penguin. (Photo by Paul Nicklen/National Geographic). Antarctic Peninsula, 2011

The female walrus and her calf. The photo was taken in the basin of Fox, North Bay. Arctic Ocean between the Peninsula and Melville. Baffin Plot of land, off the coast of Canada. Morzhiha got out on the ice floes, to protect your baby from the polar bears. (Photo by Paul Nicklen)

Wandering albatrosses, reaching a length of 117 cm, virtually all life in the sea. On the ground they land just to, to take part in the marriage ritual and hatching eggs. (Photo by Paul Nicklen)

Narwhals dive deep under the ice to feed on Arctic cod, then return to the surface to breathe and raise their tusks high in the air. (Photo by Paul Nicklen/National Geographic). Lancaster Sound, Nunavut, Canada, 2011

Southern elephant seal on the shores of Fortuna Bay, island of South Georgia. (Photo by Paul Nicklen)

Penguins. Port Lockroy, The Antarctic Peninsula. (Photo by Paul Nicklen)

Seal looks out of the hole, which have polar bears, preying on seals. (Photo by Paul Nicklen)

Polar Bear, Svalbard. (Photo by Paul Nicklen)

The hole in the ice of the glacier Hornsund, The archipelago of Svalbard. (Photo by Paul Nicklen)

Bowhead whale rises to the surface of the sea. (Photo by Paul Nicklen)

Narwhals. Lancaster-Saund, Nunavut, Canada. (Photo by Paul Nicklen)

The female Leopard seal is studying marine photographer Goran Elm (Goran Ehlmé), Anvers Island, Antarctica. (Photo by Paul Nicklen)