Chris & Monique Fallows / Long-beaked common dolphin (Delphinus capensis) breaching in front of large ship during sardine run, East London, South Africa, June.

Claudio Contreras / Boat on canal between chinampas, a wetland agricultural system. Xochimilco wetlands, Mexico City, September

Jeff Rotman / Fisherman hauling back trawler net on fishing trawler. Stellwagen Banks, New England, United States, North Atlantic Ocean Model released.

Staffan Widstrand,Staffan Widstrand / Fishermen in boats, Pulicat Lake, Tamil Nadu, India, January 2013.

Merryn Thomas,Merryn Thomas / Catamarans taking part in the Extreme 40 catamaran racing series in Cardiff Bay, Cardiff, Wales, UK, September 2012.

Cheryl-Samantha Owen / Recreational fishing in a sea kayak for West coast rock lobster (Jasus lalandii). Hoop net or trap is lowered onto the sea floor or kelp bed with a pouch of bait (sardines or pilchards) attached. Kom...

Barrie Britton / Snow covered fishing boats in Sitka Harbour, Alaska. Photograph taken on location for BBC TV series 'Nature's Great Events', March 2008.

Guy Edwardes / 2020VISION / Photographer, Paul Harris, and SWT reserve manager, Mark Blake, working from a small boat at Westhay SWT reserve, Somerset Levels, Somerset, England, UK, June 2011, Model released. Photographer quote:...

Juergen Freund / Richard Fitzpatrick releases Grey reef shark {Carcharhinus amblyrhynchos} after inserting transmitter into its belly, as part of the Coral Reef census, Lizard Island, Queensland, Australia, April 2008

Alex Mustard / Hull of a boat in shallow water, over sand ripples. North Sound, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea

Sergio Hanquet / Green turtle (Chelonia mydas) swimming in proximity to boat propeller; propellers are a danger to sea turtles. Tenerife, Canary Islands.

Tony Wu / Aerial panorama of Fonua'one'one Island in the Vava'u island group of the Kingdom of Tonga, with a boat in the foreground for scale. From this perspective, it is clear that the island comprises only a...