Hector's and Māui dolphins are endemic to the coastal regions of New Zealand. The Hector's dolphin sub-species is most abundant in discontinuous regions of high turbidity around the South Island. They are most abundant off the East Coast and West Coast, most notably around Banks Peninsula, with smaller, more isolated populations off the North Coast and South Coast (notably at Te Waewae Bay). Smaller populations are scattered around the South Island, including: Cook Strait, Kaikoura, Catlins (e.g., Porpoise Bay, Curio Bay), and Otago coasts (e.g.Karitane, Oamaru, Moeraki, Otago Harbour, and Blueskin Bay). Māui dolphin are typically found on the west coast of the North Island between Maunganui Bluff and Whanganui.