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.

Every summer, massive congregations of New Zealand sea lions and giant spider crabs descend upon the sub-Antarctic Auckland Islands to carry out their violent breeding rituals.

In Banks Peninsula's bays, tiny penguins, Hector's dolphins, and wetland birds experience a dramatic spring and summer as the epic migration of an ancient longfin eel concludes.