There are two species of freshwater dolphins in this family. Ganges River dolphins and Indus River dolphins are found in the Ganges and Indus Rivers and their tributaries, streams, and lakes in Bangladesh, India, Nepal, and Pakistan.

Ganges and Indus river dolphins have long, slender, flat beaks that are wider at the tip; dome-shaped foreheads; and broad, curved flippers.

They have long, sharp teeth that can be seen even when their mouths are closed.

Their dorsal fin is only a few inches in height and is more like a lump than a fin.

They are brownish-gray above and a lighter grayish-brown to pink on their bellies.