Troels Jacobsen/Arcticphoto / Portrait of a Southern Elephant Seal (Mirounga leonina) in water. South Georgia.

Troels Jacobsen/Arcticphoto / A Leopard Seal (Hydrurga leptonyx) grabs a Gentoo Penguin (Pygoscelis papua) from underwater. Antarctica. Sequence Three of six.

Nick Garbutt / King Penguins (Aptenodytes patagonicus) double head portrait, one some distance behnid the other, on the beach at Salisbury Plain, South Georgia, South Atlantic. January.

David Tipling / Gentoo Penguin (Pygoscelis papua) pair, Half Moon Island, Antarctica, November

Kathryn Jeffs / Cape / Pintado petrel (Daption capense) in flight over water, Drake's passage, Antarctica, January, Taken on location for BBC Frozen Planet series

Kathryn Jeffs / Pintado / Cape petrel (Daption capense) landing on water, Antarctica, January, taken on location for BBC Frozen Planet series

Kathryn Jeffs / Pintado / Cape petrel (Daption capense) in flight over water, Antarctica, January, taken on location for BBC Frozen Planet series

Kathryn Jeffs / Cape / Pintado petrel (Daption capense) in flight over water, Drake's passage, Antarctica, January Taken on location for BBC Frozen Planet series

Kathryn Jeffs / Cape / Pintado petrel (Daption capense) in flight over water, Drake's passage, Antarctica, January, Taken on location for BBC Frozen Planet series

Bryan and Cherry Alexander / Pool of water collecting on top of thawing Iceberg. Antarctica, October 2006.

Troels Jacobsen/Arcticphoto / Southern Fulmar (Fulmarus glacialoides) feeding on a Lions Mane Jellyfish (Cyanea capillata). Southern Ocean, May.

Troels Jacobsen/Arcticphoto / Adelie Penguins (Pygoscelis adeliae) porpoising whilst swimming. This enables them to breathe. Brown Bluff, Antarctica, May.

Troels Jacobsen/Arcticphoto / Leopard Seal (Hydrurga leptonyx) surfacing by an iceberg. Antarctica.

Troels Jacobsen/Arcticphoto / Leopard Seal (Hydrurga leptonyx) underwater by an iceberg. Antarctica.

Troels Jacobsen/Arcticphoto / A Leopard Seal (Hydrurga leptonyx) flays a Gentoo Penguin (Pygoscelis papua) by thrashing it to and fro. Antarctica. Sequence Six of six.

Troels Jacobsen/Arcticphoto / A Leopard Seal (Hydrurga leptonyx) grabs a Gentoo Penguin (Pygoscelis papua) from underwater. Antarctica. Sequence Five of six.

Troels Jacobsen/Arcticphoto / A Leopard Seal (Hydrurga leptonyx) grabs a Gentoo Penguin (Pygoscelis papua) from underwater. Antarctica. Sequence Four of six.

Troels Jacobsen/Arcticphoto / A Leopard Seal (Hydrurga leptonyx) grabs a Gentoo Penguin (Pygoscelis papua) from underwater. Antarctica.Sequence Two of six.

Troels Jacobsen/Arcticphoto / A Leopard Seal (Hydrurga leptonyx) grabs a Gentoo Penguin (Pygoscelis papua) from underwater. Antarctica. Sequence One of six.

Bryan and Cherry Alexander / Gentoo penguin (Pygoscelis papua) with head underwater just finishing its moult. Trinity Island, Antarctica.

Frederique Olivier / Royal Penguin (Eudyptes schlegeli) bathing in creek, Macquarie Island, Southern Atlantic, Australian Antarctica, December

Frederique Olivier / Royal Penguin (Eudyptes schlegeli) colony walking along creek, Macquarie Island, Southern Atlantic, Australian Antarctica, December 2007

David Tipling / King penguin (Aptenodytes patagonicus) in sea, South Georgia

Gabriel Rojo / Pintado / Cape petrel (Daption capense) Deception Island, Antarctic Peninsula, Antarctica, February

Gabriel Rojo / Cape / Pintado petrel (Daption capense) in flight, Drake Passage, Antarctica, February

Frederique Olivier / Melting ice and icebergs, Antarctica

Steven Kazlowski / Crabeater seal (Lobodon carcinophaga) resting on a saltwater pan of sea ice off the western Antarctic Peninsula, Southern Ocean

Steven Kazlowski / Killer whales / orcas (Orcinus orca) pod traveling in waters off the western Antarctic Peninsula, Southern Ocean