Franco Banfi / Group in small paddle boat in search of anaconda, with photography equipment, Formoso River, Bonito, Mato Grosso do Sul, Brazil

Franco Banfi / Tourist on the boat feeding Piraputanga (Brycon hilarii) Aqua¡rio Natural, Bonito, Mato Grosso do Sul, Brazil

Shattil & Rozinski / Sightseeing seaplane landing in front of docked cruise ship, Ketchikan, Alaska, USA, September 2010

Gary K. Smith / Pleasure craft taking tourists sightseeing along the coast of Dorset, with cliffs and Old Harry's rocks in the background, UK

Pete Oxford / Allepy backwaters with tourists on sightseeing boat Kerala, Southern India

Gavin Hellier / Seville Tourist boat on river with the Torre del Oro behind, Andalucia, Spain

Franco Banfi / Pod of Sperm whales (Physeter macrocephalus) swimming at sea surface in front of whale watching boat. Dominica. Caribbean Sea, Atlantic Ocean.

Franco Banfi / Pod of Sperm whales (Physeter macrocephalus) swimming at sea surface between two snorkelers and whale watching boat. Dominica. Caribbean Sea, Atlantic Ocean.

Michael Hutchinson / Humpback whale (Megaptera novaeangliae) at sea surface with people observing from whale watching boat. Monterey, California, USA. April.

Nick Garbutt / Komodo dragon (Varanus komodoensis) male, silhouetted on remote beach at sunset, with live-aboard tourist boat in the background, Komodo Island, Komodo National Park, Indonesia. Endangered.

Nick Garbutt / Komodo dragon (Varanus komodoensis) male, silhouetted on remote beach at sunset, with live-aboard tourist boat in the background, Komodo Island, Komodo National Park, Indonesia. Endangered.

Franco Banfi / Tourists on whale watching boat, Pico island, Azores, Atlantic Ocean.