New worlds and animal behaviours are uncovered on a journey from the equator to the poles.

This episode reveals what it takes to survive in the savage and forbidding world of the big blue, the world’s greatest wilderness. We witness feats of incredible endurance, moments of…

It’s our green seas, not the blue, that bring life to our oceans. Here sunlight powers the growth of enchanted forests of kelp, mangroves and prairies of sea grass. They…

On the coast, two worlds collide. Coasts are the most dynamic and challenging habitats in the ocean – that brings great rewards but also great danger. The extraordinary animals that…

In this final episode, we uncover the impact that our modern lives are having on our best-loved characters from across the series, including devoted albatross parents unwittingly feeding their chicks…

A groundbreaking journey to the deepest parts of the oceans.

The ingenious ways life exists in the undersea cities of tropical reefs.