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Chilean dolphin
The Chilean dolphin (''Cephalorhynchus eutropia''), also known as the black dolphin, is one of four dolphins in the genus ''Cephalorhynchus''. The dolphin is only found off the coast of Chile; it is commonly referred to in the country as ''tonina''.〔(Chilean Dolphin ) Spanish site promoting conservation and awareness of this species. 〕
==Physical description==
The Chilean dolphin is small at around 1.7 m (5.6 ft) in length, with a blunt head. These characteristics often make for its incorrect identification as a porpoise. This dolphin is thickly shaped with its girth up to two-thirds its length. The dorsal fin and flippers are small in proportion to body size in comparison with other dolphins. The throat, underside, and the closest part of the flippers to the body are white. The remainder of the body is a mix of greys. It has 28-34 pairs of teeth in the upper jaw and 29-33 in the lower.
The Chilean dolphin is normally sighted in small groups of around two to 10 individuals, with some larger gatherings occasionally sighted.
Longevity, gestation, and lactation periods are not known, but are believed to be similar in length to the more studied, and similar, Hector's and Commerson's dolphins which have a gestation period of about 10 months to one year and maximum longevity of 20 years.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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