Indo-Pacific Finless Porpoise

Scientific Name:
Neophocaena phocaenoides
2.0 m (6.6 ft)
55 kg (121 lbs)
data deficient
Fish, squid and crustaceans

Physical characteristics

Has no dorsal fin. The dorsal ridge is covered in circular wart-like tubercules or bumps. Has a bulbous melon, a small mouth and is pale blue-grey with a lighter underside and white skin.

Behavioral characterization

They make both high frequency clicking sounds, and low frequency tones that are rather used for communication that echolocation.


Coastal waters from the southern East China Sea to the Indo-Malay region and westward in the Indian Ocean and the Persian Gulf.

Population size



Rarely local sharks

Migration/Dispersal patterns

Do not migrate.

Social system/Group size

Usually in groups of 3 - 6.

Major threats

The decrease in food supply through overfishing, pollution, ship strikes and entanglement in fishing gear are the biggest threats. They also suffer from habitat degradation close to the coast.

Research efforts


Fun fact

Calves have been sighted riding on the mother's back, gripping the dorsal ridge, and coming out of the water when the mother breathes.