New Zealand is the only home of the smallest and rarest species of dolphin, the Hectors dolphin (Cephalorhynchus hector). It occurs mainly around the coast of the South Island, but also in a small pocket on the west coast of the North Island between Kowhai and Kaipara Harbors. Less than 100 dolphins live in the North Island area, and that group of dolphins has genetic differences to the South Island group, although the two are still one species. Hectors dolphins can be seen often in Wahiawa Bay in eastern Southland, and Porpoise Bay.

Length (meters): When they are born Hectors dolphins are between 60 and 75cm long. They grow to between 1.2 and 1.5 meters (4 - 5ft).

Weight: Hectors dolphins weigh approximately 9kg (20lb) when they are born. When they are fully grown they weigh between 35 and 60kg (75 - 130lb).

Diet: Fish, squid and sometimes crustaceans.

Behavior: Hectors dolphins are not always as sociable as other dolphins when around boats although they will bow ride, swim in the wake of passing boats and alongside slow-moving vessels. Sometimes they can be seen breaching, lob tailing and spy hopping. They are more active when groups (2-8 animals) get together.

Distribution: They only live around the coast of New Zealand and are more likely to be seen off South Island and the western coast of North Island. They prefer shallow waters and may enter estuaries and swim slightly upriver.

Population: Hectors dolphins are endangered and are one of the rarest cetaceans.

Threats: Human disturbance, chemical pollution, noise pollution, entanglement in fishing nets, prey depletion (lack of food)

Fascinating Facts: Along with the finless porpoise and the vaquita, they are one of the world's smallest cetaceans.
 

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