River dolphins worldwide

River dolphins make their homes in some of the greatest rivers on the planet, sometimes navigating long distances between feeding and breeding areas with the seasonal shifts linked to water levels. The eight tropical and subtropical river basins where they are found are: the Amazon and Orinoco in South America, and the Ganges-Brahmaputra-Meghna, Indus, Yangtze, Ayeyarwady , Mahakam and the Mekong in Asia.

Interactive map

This interactive map allows you to explore these river basins. Click on any of the river basin outlines below to reveal a pop-up window with quick links to information about the river dolphin species found there, as well as to selected resources that can be used in conservation efforts for each featured basin and species. For more detailed information on resources, visit the Downloadable Resources or Scientific Literature sections of this site.

Species Map

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Amazon river dolphin

The Amazon River dolphin is a unique freshwater species found only in the rivers of South America.

Ganges river dolphin

The Ganges river dolphin is known as the “Tiger of the Ganges” for the role it plays as a top predator, and an ecosystem indicator species; much like a tiger does in a forest.

Indus river dolphin

Indus river dolphins are also known as the blind dolphins because over millions of years they have lost the use of their eyes.

Irrawaddy dolphin

The Irrawaddy dolphin is found in marine, brackish, and freshwater environments throughout southeast Asia. The name is derived from the first specimens that were described from the Ayeyarwady river in Myanmar.


Tucuxis overlap in range with Amazon river dolphins inhabiting the central region of the Amazon river basin.

Yangtze finless porpoise

The Yangtze finless porpoise is the only freshwater porpoise in the world. It can only be found in the Yangtze River, the longest river in Asia.