A freshwater dolphin of river systems in India, Nepal and Bangladesh. It has very poor sight and uses echoes from ultrasonic sounds to locate fish and other prey.
It has a long, thin snout, rounded belly, stocky body and large flippers. Adults have smooth, gray-brown hairless skin; newborn calves are described as chocolate brown.
It lives only in freshwater and is often alone or in a small group. It can swim on one side, trailing a flipper along the muddy riverbed; the Wildlife Institute of India says this is understood to help it find food. It surfaces every 30–120 seconds to breathe.
An extinction-risk assessment has not been added yet.