恒河豚是生活于印度、孟加拉、尼泊尔与巴基斯坦的淡水豚，分成两种亚种：印度河亚种（Platanista gangetica minor）与恒河亚种（Platanista gangetica gangetica）。恒河亚种生活在恒河与布拉马普特拉河及它们位于印度、孟加拉与尼泊尔境内的支流中，而印度河亚种则只栖息在巴基斯坦的印度河中。从1970年代直到1998年为止，牠们被当成是两个不同的种。不过在1998年，栖息于恒河与印度河的恒河豚族群被重新分类为恒河豚的两个亚种。

The South Asian river dolphin (Platanista gangetica) is a freshwater or river dolphin found in India, Bangladesh, Nepal and Pakistan which is split into two subspecies, the Ganges river dolphin (P. g. gangetica) and Indus river dolphin (P. g. minor). The Ganges river dolphin is primarily found in the Ganges and Brahmaputra Rivers and their tributaries in Bangladesh, India and Nepal, while the Indus river dolphin is found in the Indus River in Pakistan and its Beas and Sutlej tributaries. From the 1970s until 1998, they were regarded as separate species; however, in 1998, their classification was changed from two separate species to subspecies of a single species (see taxonomy below). The Ganges river dolphin has been recognized by the government of India as its National Aquatic Animal.