Wild Dolphins
In the waters surrounding New Zealand live a number of dolphin species - each of which has evolved unique strategies in their family pods to survive and thrive in the different habitats around these islands in the Pacific Ocean. On the east coast of the south island off the iconic Kaikoura peninsula, an underwater canyon pushes water seething with nutrients to the surface which provides a year round banquet for huge pods of dusky dolphins. These athletic and highly social dolphins spend their nights feeding out in the canyon, and in early morning they return closer to shore where they rest socialize and play. One of their favourite activities is the “seaweed game” where individuals pass pieces of seaweed to each other practicing fancy maneuvers where they'll catch it on their tail, dorsal or pectoral fins. Down in the south west corner of New Zealand in the majestic landscape of Fiordland live the southern-most bottlenose dolphins. At almost 4 metres long these dolphins have adapted physically to the extreme winter conditions down here by growing bigger and fatter with extra insulating blubber and evolving stubbier beaks and shorter fins and tail flukes to reduce heat loss through their extremities. These fiords are different to the coastal environment in that freshwater sits on top of the denser seawater in a distinct layer, and is much colder than the saltwater and can prove lethal to the pods' calves in winter, so every year the bottlenose dolphins make a short migration to the outer fiords where there is less freshwater to enable their calves to survive. Off New Zealand's north island, in the middle of the Bay of Plenty, the country's most active volcano erupts from the sea, sending plumes of toxic gases rising skywards. In the water surrounding this volcano roam common dolphins - the nomads of the dolphin world. They are pelagic predators which mean they roam the open ocean searching for prey.
