Ross Hoddinott / View of Salcombe and harbour from Snapes Point in the early morning light. Salcombe, South Devon, UK, September 2010

Mark Carwardine / Short-finned pilot whale (Globicephala macrorhynchus) bow-riding in front of boat, Sea of Cortez, Baja California, Mexico

Shattil & Rozinski / Fishing boats in harbour, Prince Rupert, British Columbia, Canada, September 2010

Steve Knell / Ship passing by Boreray, Saint Kilda, Scotland. July 2009

Tim Laman / National Geographic ship, Endeavour, at anchor in Hatiheu Bay, Nuku Hiva, Marquesas Islands, French Polynesia, July 2006

Juergen Freund / Tourists onboard Thunderbolt 1 high speed reef boat with 600hp engine, off the coast of Queensland, Australia, 2007

Juergen Freund / Split level of research / diving boat 'Undersea Explorer' with free diver exploring the coral reef, Pixie Pinnacle, Great Barrier Reef, Queensland, Australia, 2007