Sousa chinensis

The Indo-Pacific humpback dolphin (Sousa chinensis; Chinese: 中華白海豚; pinyin: Zhōnghuá bái hǎitún). is a species of humpback dolphin inhabiting waters off the coast of Southeast Asia and Australia. Some biologists regard the Indo-Pacific dolphin as a subspecies of the Indian Ocean humpback dolphin which ranges from east Africa to India. However, DNA testing studies have shown that the two are distinct species. Indo-Pacific humpback dolphins from the Pearl River Delta in Hong Kong are often pink in color and often referred to as Chinese white dolphins. An adult Indo-Pacific humpback dolphin is gray, white or pink and may appear as an albino dolphin to some. Uniquely, the population along the Chinese coast has pink skin, and the pink colour originates not from a pigment, but from blood vessels which were overdeveloped for thermoregulation. The body length is 2 to 3.5 m (6 ft 7 in to 11 ft 6 in) for adults 1 m (3 ft 3 in) for infants. An adult weighs 150 to 230 kg (330 to 510 lb). Indo-Pacific humpback dolphins live up to 40 years, as determined by the analysis of their teeth.