The East Auckland current warms the waters around the world-renowned Poor Knights Islands, creating an astonishing environment. Caves and arches hold the only known congregation of stingrays which stack themselves between underwater walls. Demoiselles and Black Angelfish fathers protect their eggs with determination, and must keep a watchful eye on neighbors who will raid their nests in an instant! When disaster strikes and the male Sandagers Wrasse disappear, one of the harem of females undergoes a sex change to pick up the missing male's responsibilities. On land, the Tuatara and Giant Weta fuel an ancient feud, while Gannets rest for their next attack.

Kaikoura shows the playful and perilous side of this neighborhood -- from rock pools to deep in the underwater canyon, to the Gull mothers who form an unlikely bond to protect their family unit.

It's summer on New Zealand's Open Bay Islands, and the local population swells. Wily octopus, foraging crayfish and darting penguins are joined by over 4,000 New Zealand fur seals. Masterful divers, they successfully straddle two distinct neighborhoods: beneath the waves, where they play and eat – and these rocky outcrops, where they're born and mate. Mothers balance the demands of nursing pups, mating-keen males, and their own need to efficiently hunt and feed. Everyone here has new mouths to feed, including the scavenging Weka. Unable to fly nor swim, the species was introduced as food for sealers a century ago -- and has been marooned here ever since.