Join Sir David Attenborough on a definitive exploration of the mysterious bodies of water known as our planet's oceans. From the coasts to the poles, from the reefs to the deep, travel with behemoths like the Blue Whale and microscopic animals like coral polyps to experience the oceans as never before. In these two new episodes, delve into new habitats and environments that are as varied as the oceans themselves. An astounding journey that you will never forget! DVD extras include behind-the-scenes featurettes, interviews, photo galleries and fact files. Set includes the following four episodes.

The Seasonal Seas
Shafts of sunlight radiate through a green sea providing energy for the world's temperate sea, the richest of all habitats. Forests of giant kelp harbor thousands of animals as sharks move in to pick off the vulnerable. Sea otters, brilliantly colored anemones, squid and exquisite leafy dragons are just a few of the other creatures that live in this cool, rich water.

The Coral Seas
Bathed in warm, clear tropical water and brilliant sunlight, coral reefs are the rainforests of the sea. Spectacular numbers make it necessary to stand out to survive, and this competition is highly visible as brightly colored fish compete for food, territory and mates. Incredible time-lapse photography shows the dramatic formation of a coral reef, portraying its myriad inhabitants and its ultimate destruction.

Tidal Seas
Tides govern marine life and tidal marshes are one of the most productive parts of the world. Numerous plants support numerous animals, yet life is not easy: predators are attracted to these enormous quantities of food, forcing animals to seek constant protection from attack. Relief comes with the crashing waves, as the tides flow once more.

Coasts
The boundary between land and sea is an exciting place, with animals constantly coming and going. From the open oceans, millions of seabirds are forced to come onto land to breed. Turtles lay their eggs in the sand and marine mammals haul themselves out to fight on the beaches. Sea-lions emerge from the kelp to give birth, while killer whales come crashing in on the surf to snatch the sea-lions' young.