Richard Robinson / Maui's dolphin (Cephalorhynchus hectori maui) Critically Endangered, the world's smallest and rarest marine dolphin. Endemic to North Island, New Zealand. October. Editorial use only.

Richard Robinson / Hector's dolphins (Cephalorhynchus hectori) Akaroa Harbour, South Island, New Zealand, November. Editorial use only.

Richard Robinson / Hector's dolphin (Cephalorhynchus hectori) Akaroa Harbour, South Island, New Zealand, November. Editorial use only.

Richard Robinson / Maui's dolphins (Cephalorhynchus hectori maui) Critically Endangered, the world's smallest and rarest marine dolphin. Endemic to North Island, New Zealand, March. Editorial use only.

Todd Pusser / Hector's dolphins below surface {Cephalorhynchus hectori} Kaikoura, New Zealand Pacific

TOM WALMSLEY / Hectors dolphins surfacing {Cephalorhynchus hectori} Akaroa, New Zealand

TOM WALMSLEY / Hectors dolphins underwater {Cephalorhynchus hectori} Akaroa, New Zealand

TOM WALMSLEY / Hectors dolphin ventral tail slap {Cephalorhynchus hectori} Akaroa, New Zealand

TOM WALMSLEY / Hectors dolphin {Cephalorhynchus hectori} Akaroa, New Zealand

TOM WALMSLEY / Hectors dolphin at surface {Cephalorhynchus hectori} Akaroa, New Zealand

TOM WALMSLEY / Hectors dolphin mother + calf {Cephalorhynchus hectori} Akaroa, New Zealand

Todd Pusser / Hectors dolphins at surface {Cephalorhynchus hectori} Kaikoura, New Zealand Pacific