The head and body length is 80-110 cm. The length of the pectoral fin is 15-30 cm. The width of the tail fluke is 30-40 cm. They eat fish, squid, and crustaceans. They mate as normal dolphins do in the early winter and they bear their young in the spring.
Females generally have one calf about every two years.
This is a very shy species, found along coasts in groups of 8 to 14 individuals. There are some reports of aggregations of 20-50. They use echolocation. Habitat They like shallow, muddy, and turbid waters. They are known to ascend rivers.