Pink river dolphin

     Also known as the boto, the Amazon river dolphin is one of the world's three dolphins that are constrained to freshwater habitat. The species is widely distributed throughout much of the Amazon and Orinoco river basins. Like its relatives elsewhere, the boto's habitat is threatened by river development projects: Hydroelectric and irrigation schemes separate rivers in bodies of waters, which may reduce the species range and its ability to breed.

     The boto has a pale pink colour, and is different from other dolphins because it has a flexible neck, which allows it to move its head left and right. It has a long snout, a rounded head and small dorsal fin, with overall length varying from 2 to 2.5 m. The boto feeds on fish and other aquatic organisms such as turtles and crabs.