
As the tide rises in New Zealand's Northland Harbours, Stingrays and Eagle rays swim in to feast on shellfish. But they are not the top of the food chain. Only in New Zealand, and only in these harbours do Orca hunt rays. Trapped in the shallows, the rays breach the surface and swim for their lives, as the Orca pursue – with a highly evolved practice for avoiding the rays' stinging tail.
As the tide rises in New Zealand's Northland Harbours, Stingrays and Eagle rays swim in to feast on shellfish. But they are not the top of the food chain. Only in New Zealand, and only in these harbours do Orca hunt rays. Trapped in the shallows, the rays breach the surface and swim for their lives, as the Orca pursue – with a highly evolved practice for avoiding the rays' stinging tail.
Just north of New Zealand's biggest city, tens of thousands of fish school meters from the beach in one of the world's first marine reserves. Inside the Goat Island Reserve giant snapper can live for eighty years and crayfish grow to weigh 8 kilos. Both feed on the thousands of sea urchins that graze the kelp forest, maintaining a delicately balanced ecosystem. Like many of the reserve's inhabitants, they entrust their larvae to the ocean currents - so how do they find their way back to the reef when they take on their adult form and settle down?