Distribution
The finless porpoise lives in the coastal waters of Asia, especially around Korea, India, China, Indonesia, Bangladesh and Japan. A unique fresh water population (N. p. asiaeorientalis) is found in the Yangtze River. At the western end, their range includes the length of the western coast of India and continues up into the Persian Gulf. Throughout their range, the porpoises stay in shallow waters (up to 50 m ), close to the shore, in waters with soft or sandy seabeds. In exceptional cases, they have been encountered as far as 160 kilometres (99 mi) off-shore in the East China and Yellow Seas, albeit still in shallow water. N. p. phocaenoides has wide ridge on its back and ranges from Pakistan to the Taiwan straits. N. p. sunameri has a narrower ridge, and is found from Taiwan, north to the Sea of Japan. The population in coastal waters around Japan is geographically isolated by the deep waters between Japan and continental Asia.
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