Hector’s dolphin is endemic to New Zealand, and it has one of the most restricted distributions of any cetacean (Dawson and Slooten 1988; Dawson 2002). They are most common off the South Island and the west coast of the North Island. There are at least three genetically separate populations in the South Island, and a single small North Island population (C. h. maui - Baker et al. 2002).
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