This dolphin has no beak and a rounded, bulging forehead. It uses coastal, muddy, brackish river mouths and deltas; river populations are also recorded.
It lacks a beak and has a rounded forehead that projects beyond the mouth. A flexible neck creates visible folds behind the head; the dorsal fin is small and triangular. Its skin ranges from slate blue to slate gray, with a paler underside.
It uses muddy, brackish river mouths and deltas near coasts. In Myanmar’s Irrawaddy River, dolphins have been recorded cooperating with fishers to herd fish. It eats fish, cephalopods and crustaceans.
An extinction-risk assessment has not been added yet.