Finless porpoise

Neophocaena phocaenoides


As the name implies, finless porpoises have no dorsal fin. Adults reach about 1.9 m in length. Their dark grey body is slender with a rounded head and no beak.


Finless porpoises are generally found as singles, pairs, or in groups of up to 20. This porpoise occurs in tropical to warm temperate shallow waters of the Indo-Pacific region, mostly in coastal waters, including mangrove swamps, estuaries, and some large rivers. The finless porpoise prefers areas where rivers and the ocean meet. Our research has resulted in an estimate of 1,382 individuals in the coastal waters of Bangladesh. Finless porpoises have also been sighted in the Sundarbans mangrove forests.


Finless porpoises are extremely susceptible to entanglement in gillnets, and large numbers continue to be killed throughout their range. This coastal species also suffers from serious problems of habitat loss and degradation, vessel strikes, and environmental contamination.