The South Asian river dolphins are two species of toothed whales in the genus Platanista, both of which live in fresh water habitats in northern South Asia. Both species in the genus are endangered.
Until 1998, they were regarded as two separate species; in 1998, the classification was changed from two separate species to subspecies. More recent studies have recovered them as distinct species, and they have thus been reclassified as such.
The South Asian river dolphin is native to freshwater river systems in Nepal, India, Bangladesh and Pakistan. They are found in the Indus River and connected channels, in the Beas River, in the Ganges and Brahmaputra rivers and their tributaries in Pakistan, India, Bangladesh and Nepal. They live in water with high abundance of prey and reduced flow. They migrate seasonally downstream in colder conditions with lower water levels and upstream in warmer conditions with higher water levels.