Shibai Xiao / Marbled eel (Anguilla marmorata) captured by local people and being held up in net, Hainan Island, China. No release available.

Ole Jorgen Liodden / King Penguin (Aptenodytes patagonicus) colony in heavy snow. South Georgia Island, Southern Ocean, November.

Bryan and Cherry Alexander / Chinstrap penguins (Pygoscelis antarcticus) and Snowy sheathbill (Chionis alba) on snowy rocks. Half Moon Island, South Shetland Islands, Antarctica, October.

Bryan and Cherry Alexander / Chinstrap penguins (Pygoscelis antarcticus) on snowy rocks. Half Moon Island, South Shetland Islands, Antarctica, October.

Matthew Maran / A man sitting in the cable car of a chair bridge as it crosses a river. The West Coast Trail, Pacific Rim National Park, Vancouver Island, Canada, September 2010. Model released

Billy Black / Starfish in half Oyster (Lophia folium) shell lying on bed of seaweed. Pumpkin Island, Maine, USA.

Nick Garbutt / Chin-strap Penguin (Pygoscelis antarcticus) displaying. Half-Moon Island, South Shetland Islands, Antarctica. February. (digitally stitched image)

Eric Baccega / Buriat shaman plays tambourine on Olkhon Island, Baikal lake, Siberia, Russia, June 2000

Juergen Freund / Fred Gurgel organizing his algae / seaweed specimens, as part of the Coral Reef census, Lizard Island, Queensland, Australia, April 2008

Norbert Wu / Sipadan Island, a rich oceanic island surrounded by coral reef, Borneo

Fred Bavendam / Sunset with hard corals and small reef fish just beneath the water's surface at Bunaken Island, Manado Tua Marine National Park, Indonesia

Fred Bavendam / Garden of Hard Corals just beneath the water's surface at Bunaken Island, Manado Tua Marine National Park, Manado, North Sulawesi, Indonesia

Fred Bavendam / Garden of Hard Corals just beneath the water's surface at Bunaken Island, Manado Tua Marine National Park, Manado, North Sulawesi, Indonesia

David Tipling / Chinstrap penguins (Pygoscelis antarcticus) gathered around basalt rock formation in order to breed, Half Moon Island, Antarctica, November

David Tipling / Chinstrap Penguin (Pygoscelis antarctica) calling in courtship display, Half Moon Island, Antarctica

David Tipling / Gentoo Penguin (Pygoscelis papua) guarding nest from Brown Skua (Stercorarius antarcticus), Half Moon Island, Antarctica, November

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

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

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

Konrad Wothe / Antarctic Fur Seal (Arctocephalus gazella) Half Moon Island, South Shetland Island, Antarctica. February.

Rick Tomlinson / SY "Adele", 180 foot Hoek Design, motoring past Half Moon Island, Half Moon Bay, Antarctica, January 2007 Non editorial uses must be cleared individually.

Gerrit Vyn / Leach's storm-petrel (Oceanodroma leucorhoa) adult walking to its nest burrow at night on St. Lazaria Island, Alaska, USA, June. The tiny island hosts more than half-a-million nesting Leach's and Fork...

Kevin Schafer / Kelp Gull (Larus dominicanus) on nest, Half Moon Island, South Shetland Islands, Antarctica

Brent Stephenson / Chinstrap Penguin (Pygoscelis antarctica) rookery in late summer. Half Moon Island, Antarctic Peninsula, Antarctica, January.

Brent Stephenson / Chinstrap Penguin (Pygoscelis antarctica) chick being guarded by its parent. Half Moon Island, Antarctic Peninsula, Antarctica, January.

Brent Stephenson / Chinstrap Penguin (Pygoscelis antarctica) chick being guarded by its parent. Half Moon Island, Antarctic Peninsula, Antarctica, January.

Brent Stephenson / Chinstrap Penguin (Pygoscelis antarctica) calling from its nest at the rookery, closeup. Half Moon Island, Antarctic Peninsula, Antarctica, January.

Brent Stephenson / Chinstrap Penguin (Pygoscelis antarctica) calling from its nest at the rookery with flippers outstretched. Half Moon Island, Antarctic Peninsula, Antarctica, January.

Brent Stephenson / Chinstrap Penguin (Pygoscelis antarctica) calling from its nest at the rookery with flippers outstretched. Half Moon Island, Antarctic Peninsula, Antarctica, January.

Brent Stephenson / Chinstrap Penguin (Pygoscelis antarctica) chicks begging for food from its parent. Half Moon Island, Antarctic Peninsula, Antarctica, January.

Brent Stephenson / Chinstrap Penguin (Pygoscelis antarctica) chicks begging for food from its parent. Half Moon Island, Antarctic Peninsula, Antarctica, January.

Brent Stephenson / Gentoo Penguin (Pygoscelis papua) chick with flippers outstretched, half grown. Aitcho Island, South Shetland Islands, Antarctica, January.

Brent Stephenson / Large grounded iceberg with grooved vertical channels. Half Moon Island, Antarctic Peninsula, Antarctica, December.

Brent Stephenson / Chinstrap Penguin (Pygoscelis antarctica) pair greeting each other at the nest. Half Moon Island, Antarctic Peninsula, Antarctica, December.

Brent Stephenson / Chinstrap Penguin (Pygoscelis antarctica) calling from its nest at the rookery. Half Moon Island, Antarctic Peninsula, Antarctica, December.

Brent Stephenson / Chinstrap Penguin (Pygoscelis antarctica) looking at its hatching egg. Note hole where chick can be seen breaking through shell. Half Moon Island, Antarctic Peninsula, Antarctica, December.

Brent Stephenson / Chinstrap Penguin (Pygoscelis antarctica) with small chick begging for food. Half Moon Island, Antarctic Peninsula, Antarctica, December.

Brent Stephenson / Chinstrap Penguin (Pygoscelis antarctica) calling from its nest at the rookery. Half Moon Island, Antarctic Peninsula, Antarctica, December.

Brent Stephenson / Chinstrap Penguin (Pygoscelis antarctica) rookery at the early chick stage, cruise ship tourists in the distance. Half Moon Island, Antarctic Peninsula, Antarctica, December.

Brent Stephenson / Chinstrap Penguin (Pygoscelis antarctica) rookery at the early chick stage. Half Moon Island, Antarctic Peninsula, Antarctica, December.

Brent Stephenson / Chinstrap Penguin (Pygoscelis antarctica) with a small chick. Half Moon Island, Antarctic Peninsula, Antarctica, December.

Pete Oxford / Eastern diamondback rattlesnake (Crotalus adamanteus) half submerged in sand, Little St Simon's Island, Barrier Islands, Georgia, USA. Venomous pitviper, the heaviest venomous snake in the Americas an...

Bryan and Cherry Alexander / Male Chinstrap penguins (Pygoscelis antarcticus) displaying on rocks. Half Moon Island, South Shetland Islands, Antarctica.

Bryan and Cherry Alexander / Chinstrap penguins (Pygoscelis antarcticus) on Baliza Hill, Half Moon Island, with Livingston Island beyond. South Shetland Islands, Antarctica.

Bryan and Cherry Alexander / Pair of Chinstrap penguins (Pygoscelis antarcticus) on their nest site, with icebergs drifting past. Half Moon Island, South Shetland Islands, Antarctica.

Bryan and Cherry Alexander / Pintado petrels (Daption capense) swooping over Half Moon Island, Antarctica, October.

Pete Oxford / Red Mangrove (Rhizophora mangle) stand, Bonaire, Netherlands Antilles, Caribbean

Juergen Freund / Aerial view of an unhabited mangrove island, with half the mangroves already harvested. Coconut trees are grown here and there and some trees seem to be burned. Palawan, Philippines, April 2010.

Matthew Maran / Tidal waters coming into a forested inlet. Half Moon Bay, Vancouver Island, Canada, March 2010.

Colin Monteath / Lichen covered rock, Half Moon Island, South Shetland Islands, Antarctica

Eric Baccega / Portrait of Joey Carpenter, half Inuit, half Irish, working on his computer at home. Sachs harbour village, Banks Island, Northwest Territories, Canada, August 2010

Billy Black / Two starfish in half Oyster (Lophia folium) shell lying on bed of seaweed. Pumpkin Island, Maine, USA.

Konrad Wothe / Antarctic Fur Seal (Arctocephalus gazella), Half Moon Island, Antarctica

Konrad Wothe / Chinstrap Penguin (Pygoscelis antarctica) eating snow, Half Moon Island, Antarctica

Sue Flood / Watercolour artist, David McEown, painting on Half Moon Island, Antarctic peninsula, November 2008

Sue Flood / View of Livingstone Island from Half Moon Island, Antarctic peninsula, November 2008

Andy Rouse / Aerial view of Half Moon Island, South Shetland Islands, Antarctica, February 2006

David Tipling / Gentoo penguin {Pygoscelis papua} on nest in snow, Half Moon Island, Antarctica

David Tipling / Gentoo penguin {Pygoscelis papua} mating pair, Half Moon Island, Antarctica

David Tipling / Southern Giant Petrel {Macronectes giganteus} on snow, Half Moon Island, Antarctica

David Tipling / Gentoo penguin {Pygoscelis papua} calling, Half Moon Island, Antarctica

David Tipling / Southern Giant Petrel {Macronectes giganteus} stretching wings, Half Moon Island, Antarctica

Gabriel Rojo / Chinstrap / Bearded penguin (Pygocelis antartica) feeding chick, Half Moon Island, Moon Bay, Livingston Island, Macfarlane Strait, South Shetland Island, Antarctic Peninsula, Antarctica, February

Pete Oxford / Redlip Parrotfish (Scarus rubroviolaceus), Wolf Island, Galapagos Islands, Ecuador

Jan Vermeer / Chinstrap Penguin (Pygoscelis antarctica) group calling, Half Moon Island, Antarctica

Jan Vermeer / Chinstrap Penguin (Pygoscelis antarctica) walking, Half Moon Island, Antarctica

Jan Vermeer / Chinstrap Penguin (Pygoscelis antarctica) calling and spreading wings, Half Moon Island, Antarctica

Jan Vermeer / Chinstrap Penguin (Pygoscelis antarctica) calling and spreading wings, Half Moon Island, Antarctica

Jan Vermeer / Chinstrap Penguin (Pygoscelis antarctica) group calling, Half Moon Island, Antarctica

Tui De Roy / Chinstrap Penguin (Pygoscelis antarctica) climbing snowy slope, Half Moon Island, South Shetland Islands, Antarctica

Norbert Wu / Casuarina (Casuarina equisetifolia) trees on Granite Island, Seychelles, Indian ocean

Norbert Wu / Shallow sand in Lagoon of Moorea, French Polynesia

Gerry Ellis / Gentoo Penguin (Pygoscelis papua) wading through shallow water, Half Moon Island, Antarctica Peninsula, Antarctica

Norbert Wu / Green Sea Turtle (Chelonia mydas) and scuba diver underwater, Sipadan Island, Borneo

Norbert Wu / Split-view showing swimming school of fish and buildings on beach, Sipadan Island, Borneo, Celebes Sea

Fred Bavendam / Sunset and a garden of Hard Corals just beneath the water's surface at Bunaken Island, Manado Tua Marine Park, Manado, Sulawesi, Indonesia

Fred Bavendam / Sunset and a garden of Hard Corals just beneath the water's surface at Bunaken Island, Manado Tua Marine National Park, North Sulawesi, Indonesia

Norbert Wu / Above and below water view of coral reef and tropical island, Solomon Islands

Norbert Wu / Above and below water view of coral reef and tropical island, Solomon Islands

Norbert Wu / Coral reefs, snorkeler and tropical island, Palau

Norbert Wu / Coral reefs and tropical island famous dive sites, Palau

Fred Bavendam / Garden of Hard Corals just beneath the water's surface at the Bunaken Island, Manado Tua Marine National Park, Manado, North Sulawesi, Indonesia

Fred Bavendam / Garden of Hard Corals just beneath the water's surface at Bunaken Island, Manado Tua Marine National Park, Manado, North Sulawesi, Indonesia

Fred Bavendam / Above and below water view of a garden of hard corals just beneath the water's surface and sunset at Bunaken Island, North Sulawesi, Indonesia

Tui De Roy / Weddell Seal (Leptonychotes weddellii) pup, Half Moon Island, South Shetland Islands, Antarctica

Tui De Roy / Chinstrap Penguin (Pygoscelis antarctica) courtship display, Half Moon Island, South Shetland Islands, Antarctica

Tui De Roy / Chinstrap Penguin (Pygoscelis antarctica), Half Moon Island, South Shetland Islands, Antarctica

Norbert Wu / The Rock Islands of Palau, the limestone islands have been eroded into mushroom-like formations

Fred Bavendam / Above and below water view of a garden of hard corals just beneath the water's surface and sunset at Bunaken Island, North Sulawesi, Indonesia

Kevin Schafer / Chinstrap Penguin (Pygoscelis antarctica) sliding down snow-covered hillside, Half Moon Island, South Shetland Islands, Antarctica

Matthias Breiter / Ochre Sea Star (Pisaster ochraceus) pair along shoreline on Baranof Island near Sitka, Alaska

Colin Monteath / Lichen covered rock, Half Moon Island, South Shetland Islands, Antarctica

Konrad Wothe / Chinstrap Penguin (Pygoscelis antarctica) group molting, Half Moon Island, Deception Island, Antarctica

Onne van der Wal / Tenders on the shore with visitors from a cruise ship exploring the volcanic crater of Deception Island, Antarctic Peninsula. Half buried buildings and machinery remain after a landslide on the island...

Norbert Wu / Bottlenose Dolphin (Tursiops truncatus) swimming in shallow water, Caribbean Sea, Roatan, Honduras