Around White Island, common dolphins, Australasian gannets and local reef residents adapt to survive the toxin conditions on New Zealand's most active volcano.

New Zealand's remote Chatham Islands attract roaming predators from all over the South Pacific - but the resident blue cod and brown skuas might just be the most ferocious of all.

In the wettest corner of New Zealand, where alien ocean creatures flourish under a freshwater layer, crested penguins struggle to raise their chicks in the midst of a harsh Fiordland winter.