David Noton / Palm trees line the beach at Pigeon Point, Tobago

Doug Perrine / Bioluminescence from glowing plankton in sea tide line on beach, with stars above and ship lights on horizon, Vaadhoo Island, Raa Atoll, Maldives, Indian Ocean, October 2010

David Shale / Deep sea Anglerfish {Himantolophus sp} female with lure projecting from head to attract prey, Atlantic ocean. Anglerfish have small poorly developed eyes but detect movement and prey through a well de...

Oscar Dewhurst / Fallow deer (Dama dama) walking across frost-covered playing fields at dawn, with tower blocks of London in the background. Richmond Park, London, UK. December

Jordi Chias / Gentoo penguins (Pygoscelis papua) walking in line, returning to nesting area, Port Charcot, Antarctic Peninsula, Antarctica.

Jordi Chias / Gentoo penguins (Pygoscelis papua) walking in line, returning to nesting area, Port Charcot, Antarctic Peninsula, Antarctica.

Jordi Chias / Gentoo penguins (Pygoscelis papua) walking in line, returning to nesting area, Port Charcot, Antarctic Peninsula, Antarctica.

Ralph Pace / Shortfin Mako (Isurus oxyrhynchus) male caught on fishing line, California

John Shaw / King penguins (Aptenodytes patagonicus) walking in line on a windy beach. Sanders Island, Falklands. November.

SCOTLAND: The Big Picture / Grey seal (Halichoerus grypus) using freshwater pools along the shore line and in the adjacent fields as place to learn to swim, Orkney, Scotland, UK, April.

Marie Read / Black skimmers (Rynchops niger), three in non-breeding plumage on beach, Fort De Soto Park, St. Petersburg, Florida, USA. January. Digitally altered to remove distractions.

Jami Tarris / African Elephant (Loxodonta africana) herd on savanna, Mount Kilimanjaro, Amboseli National Park, Kenya