Solvin Zankl / Fish eye view of sails of Corwith Cramer, 134-foot steel brigantine research vessel, Sargasso Sea, Bermuda, April.

Flip Nicklin / Gray Whale (Eschrichtius robustus) curious calf spyhopping near whale watching boat, Magdalena Bay, Baja California, Mexico

Suzi Eszterhas / Biologist Rebecca Cliffe looking for Brown-throated Three-toed Sloths (Bradypus variegatus) in trees above, Aviarios Sloth Sanctuary, Costa Rica

Suzi Eszterhas / Brown-throated Three-toed Sloth (Bradypus variegatus) with sloth backpack tracking device, riding in boat to release site, Aviarios Sloth Sanctuary, Costa Rica

Suzi Eszterhas / Brown-throated Three-toed Sloth (Bradypus variegatus) biologist, Rebecca Cliffe, holding sloth while traveling in boat to release site, Aviarios Sloth Sanctuary, Costa Rica

Christophe Courteau / Fishing vessel coming in to Guilvinec Port at sunset, Finistere, Brittany, France. December. All non-editorial uses must be cleared individually.

Scott Leslie / Canoeists at dawn, Everglades National Park, Florida

Scott Leslie / Canoeists at dawn, Everglades National Park, Florida

Scott Leslie / Canoeists at dawn, Everglades National Park, Florida

Pete Oxford / Docked ferry boat, Strait of Magellan, Tierra Del Fuego, Chile

Pete Oxford / Docked ferry boat, Strait of Magellan, Tierra Del Fuego, Chile

Richard Herrmann / Tourists in zodiac approaching coastline, Cedros Island, Baja California, Mexico

Philip Stephen / Pelagic fishing vessel 'Challenge' approaching Peterhead Harbour in rough weather, Aberdeenshire, Scotland. January 2014. All non-editorial uses must be cleared individually.

Philip Stephen / Fishing vessel 'Ocean Harvest' trawling at dusk, North Sea, May 2014. Property released. All non-editorial uses must be cleared individually.

Philip Stephen / Fishing vessel 'Ocean Harvest' riding out stormy weather on the North Sea, January 2014. All non-editorial uses must be cleared individually.

Philip Stephen / Fishing vessel 'Ocean Harvest' riding out stormy weather on the North Sea, January 2014. All non-editorial uses must be cleared individually.

Philip Stephen / Fishing vessel 'Ocean Harvest' retrieving net while fishing on the North Sea, February 2014. All non-editorial uses must be cleared individually.

Philip Stephen / Fishing vessel 'Ocean Harvest' retrieving net, surrounded by Gannets (Morus bassanus) and a variety of gulls, while fishing on the North Sea, February 2014. All non-editorial uses must be cleared indi...

Suzi Eszterhas / Brown-throated Three-toed Sloth (Bradypus variegatus) biologist, Rebecca Cliffe, holding sloth wearing sloth backpack while traveling in boat to release site, Aviarios Sloth Sanctuary, Costa Rica

Suzi Eszterhas / Hoffmann's Two-toed Sloth (Choloepus hoffmanni) biologist, Rebecca Cliffe, looking for sloths in trees above, Aviarios Sloth Sanctuary, Costa Rica

Theo Webb / Southern elephant seal (Mirounga leonina) lying near an old whaling vessel, near Grytviken, South Georgia

Pascal Kobeh / Drag net of a seine fishing vessel full of Yellowfin tuna (Thunnus albacares), Los Roques, Venezuela. Caribbean.

Steve O. Taylor (GHF) / People aboard passenger vessel from Sherbro Island to York Island. Sierra Leone, 2004-2005.

Steve O. Taylor (GHF) / Local cargo and passenger vessel with crew, Port Loko, Sierra Leone, 2004-2005.

Steve O. Taylor (GHF) / Local cargo and passenger vessel with crew, Port Loko, Sierra Leone, 2004-2005.

Steve O. Taylor (GHF) / Trade vessel on journey to Mbandaka, Momboyo river, Democratic Republic of the Congo, 2008-2009.

Sam Hobson / Bananaquit (Coereba flaveola) drinking fruit juice from glass on hotel balcony. Stonehaven Bay, Tobago, Trinidad and Tobago.

Sean Crane / A small dock and canoe, Lake Chalalan, Madidi National Park, Bolivia

Angelo Gandolfi / Bottle of wine produced in Brazil's southern states, Santa Catarina State, Brazil.

Pete Oxford / Cape Fur Seal (Arctocephalus pusillus) near harbor, Hout Bay, Western Cape, South Africa

Pete Oxford / Cape Fur Seal (Arctocephalus pusillus) pair in harbor, Hout Bay, Western Cape, South Africa

Philip Stephen / Fishing vessel 'Harvester' on a stormy North Sea, December 2013. All non-editorial uses must be cleared individually.

Philip Stephen / Fishing vessel 'Harvester' powering through rough seas while operating in the North Sea, December 2013. All non-editorial uses must be cleared individually.

Philip Stephen / Fishing vessel 'Harvester' powering through rough seas while operating in the North Sea, December 2013. All non-editorial uses must be cleared individually.

Philip Stephen / Fishing vessel 'Antares' in Symbister Harbour, Whalsay, Shetland Islands, November 2013. All non-editorial uses must be cleared individually.

Philip Stephen / Pelagic fishing vessel 'Serene' moored in Symbister Harbour, Whalsay, Shetland Islands, November 2013. All non-editorial uses must be cleared individually.

Roland Seitre / Humpback Whale (Megaptera novaeangliae) with boat propeller injury

Pal Hermansen / Fish eye view of pack ice from the Expedition vessel Origo, Svalbard, Norway, September 2011.

Michael Pitts / Diver on the bow of U-Boat -U352. Type VIIC sunk off Cape Lookout on the 9th May 1942, North Carolina, USA, September 2013.

Michael Pitts / Diver on the conning tower of U-Boat -U352. Type VIIC sunk off Cape Lookout on the 9th May 1942, North Carolina, USA, September 2013.

Duncan Usher / Autumn mist across river, Weser River, Lower Saxony, Germany

Hiroya Minakuchi / Gray Whale (Eschrichtius robustus) and whale watchers in small boat, San Ignacio Lagoon, Baja California, Mexico

Kevin Schafer / Pygmy Raccoon (Procyon pygmaeus) in boat, Cozumel Island, Mexico

Sebastian Kennerknecht / Sunda Clouded Leopard (Neofelis diardi) researcher Andrew Hearn radio tracking from boat with other biologists, Kinabatangan River, Sabah, Borneo, Malaysia

Murray Cooper / Tourists and birdwatchers in canoe, Amazon, Ecuador

Murray Cooper / Toursist and birdwatchers in canoe, Amazon, Ecuador

Michele Westmorland / Fish-eye view of Blue-footed Boobies (Sula nebouxii) sitting on bow of vessel. Wolf Island, Galapagos Islands.

Michele Westmorland / Fish-eye view of Blue-footed Boobies (Sula nebouxii) sitting on bow of vessel. Wolf Island, Galapagos Islands.

Michele Westmorland / Passengers being ferried to dive excursion vessel at the marina in San Cristobal, Galapagos Islands, September 2011. Property released and model released.

Suzi Eszterhas / Gray Whale (Eschrichtius robustus) calf surfacing near whale watchers, San Ignacio Lagoon, Baja California, Mexico

Suzi Eszterhas / Gray Whale (Eschrichtius robustus) calf breaching near whale watchers, San Ignacio Lagoon, Baja California, Mexico

Suzi Eszterhas / Gray Whale (Eschrichtius robustus) calf touched by whale watchers, San Ignacio Lagoon, Baja California, Mexico

Suzi Eszterhas / Blue Whale (Balaenoptera musculus) surfacing near whale watchers, Baja California, Mexico

Colin Monteath / Sailboat anchored in bay at sunrise, Split Apple Rock, Abel Tasman National Park, South Island, New Zealand

Suzi Eszterhas / Humpback Whale (Megaptera novaeangliae) and California Sea Lion (Zalophus californianus) raft foraging, Monterey Bay, California

Suzi Eszterhas / Humpback Whale (Megaptera novaeangliae) pair diving near whale watching boat, Monterey Bay, California

Suzi Eszterhas / Humpback Whale (Megaptera novaeangliae) lobtailing to stun anchovy prey, with California Sea Lion (Zalophus californianus) raft also hunting prey fish, Monterey Bay, California

Suzi Eszterhas / California Sea Lion (Zalophus californianus) raft foraging, Monterey Bay, California

Suzi Eszterhas / California Sea Lion (Zalophus californianus) raft warming flippers in the sun, Monterey Bay, California

Duncan Usher / Kayakers on Oxbow Bend, Grand Teton National Park, Wyoming

Roland Seitre / Ganges River Dolphin (Platanista gangetica) surfacing near boat, India

Cheryl-Samantha Owen / Crew aboard the West coast rock lobster (Jasus lalandii) fishing vessel James Archer (Oceana fisheries) baiting traps, in Saldanha Bay and St. Helena Bay, Western Cape, South Africa.

Matthias Breiter / Kayaker, Paradise Bay, Antarctic Peninsula, Antarctica

Matthias Breiter / Kayaker, Paradise Bay, Antarctic Peninsula, Antarctica

Matthias Breiter / Iceberg and tourists in Grey Lake, Torres del Paine National Park, Chile

Matthias Breiter / Gentoo Penguin (Pygoscelis papua) porpoising in front of zodiak with tourists, Neko Harbor, Antarctic Peninsula, Antarctica

Matthias Breiter / Sea Otter (Enhydra lutris) raft, Kodiak, Alaska

Pete Oxford / Canoe on Lekoli River, Democratic Republic of the Congo

Pete Oxford / Eco Guards on patrol, Odzala-Kokoua National Park, Democratic Republic of the Congo

Pete Oxford / Man paddling canoe down Lekoli River, Democratic Republic of the Congo

Pete Oxford / Dugout canoe on Lekoli River, Democratic Republic of the Congo

Winfried Wisniewski / African Elephant (Loxodonta africana) pair and tourist boats in Chobe River, Chobe National Park, Botswana

Michael Pitts / Diver on the propellor of the 'Heian Maru' large cargo vessel sunk at Chuuk Lagoon during Operation Hailstone 17/18th February 1944, Chuuk Lagoon, Federated States of Micronesia

Cyril Ruoso / Sumatran Rhinoceros (Dicerorhinus sumatrensis) anti-poaching team, Way Kambas National Park, Sumatra, Indonesia

Cyril Ruoso / Sumatran Rhinoceros (Dicerorhinus sumatrensis) anti-poaching team, Way Kambas National Park, Sumatra, Indonesia

Cyril Ruoso / Boater, in an inflatable boat, speeding by icebergs from Vatnajokull Glacier, Jokalsarlon Lagoon, Iceland

Cyril Ruoso / Docked boats and reflections, Streymoy Island, Faroe Islands

Flip Nicklin / Tourists viewing Dawes Glacier from zodiac, Endicott Arm, southeast Alaska

Flip Nicklin / Humpback Whale (Megaptera novaeangliae) surfacing near kayacker, Freshwater Bay, southeast Alaska

Roland Seitre / Southern Bluefin Tuna (Thunnus maccoyii) aquafarms, Port Lincoln, South Australia, Australia

Hiroya Minakuchi / Canoeing on Kinabatangan River, Sabah, Borneo, Malaysia

Hiroya Minakuchi / Gray Whale (Eschrichtius robustus) encounter with whale watchers, San Ignacio Lagoon, Baja California, Mexico

Hiroya Minakuchi / Gray Whale (Eschrichtius robustus) spyhopping near whale watchers, San Ignacio Lagoon, Baja California, Mexico

Michael Pitts / Soft corals growing at the base of the forward mast on the Japanese merchant vessel 'Kasi Maru' Bairoko Harbour, Solomon Islands, November 2009

Florian Möllers / Dutch fishing vessel on the Maarkermeer cleaning its gillnets and fish traps. Afsluitdijk, The Netherlands, July

Franco Banfi / Scuba diver exploring Viana wreck, the hull is covered with spiral Tube-worm (Sabella spallanzani). Propeller of Viana wreck, a vessel set on fire in the Horta harbour. In attempt to contain the fire,...

Franco Banfi / Propeller of Viana wreck, a vessel set on fire in the Horta harbour. In attempt to contain the fire, the boat was sunk there. After a few months, the vessel was mended to float and transported to the...

Ingo Arndt / Fisherman on Tisza River on foggy morning, Hungary

Mark Carwardine / Harp seal skins laid out on ice beside sealing vessel, Gulf of St Lawrence, Canada

Mark Carwardine / Harp seal skins laid out on ice beside sealing vessel, Gulf of St Lawrence, Canada

Richard Herrmann / Humpback Whale (Megaptera novaeangliae) and Brown Pelicans (Pelecanus occidentalis) feeding on Northern Anchovies (Engraulis mordax), Avila Bay, California

Donald M. Jones / Grizzly Bear (Ursus arctos horribilis) investigating motor boat, Brooks Falls, Alaska

Jim Brandenburg / Fireweed (Chamerion angustifolium) flowering in meadow with kayaker on lake, Minnesota

Hiroya Minakuchi / Humpback Whale (Megaptera novaeangliae) surfacing near zodiac full of tourists, Antarctic Peninsula, Antarctica

Sergey Gorshkov / Brown Bear (Ursus arctos), at dock with Domestic Dogs (Canis familiaris) Kamchatka, Russia

Sergey Gorshkov / Brown Bear (Ursus arctos) with boat, Kamchatka, Russia