Luminous beings, creatures with their own internal light, enchant and astonish us. Anyone who has seen a firefly or a glow-worm cannot help but fall under their spell. The sea at night sparkles as millions of luminous plankton reveal the shapes of dolphins in a truly magical light show

Wildlife documentary series, presented and narrated by David Attenborough, exploring the planet's oceans.

In recent years, our knowledge of life beneath the waves has been transformed. Using cutting-edge technology, One Ocean takes us on a journey from the intense heat of the tropics to our planet's frozen poles to reveal new worlds and extraordinary never-before-seen animal behaviours.

In recent years, our knowledge of life beneath the waves has been transformed. Using cutting-edge technology, One Ocean takes us on a journey from the intense heat of the tropics to our planet's frozen poles to reveal new worlds and extraordinary never-before-seen animal behaviours.

The deep is perhaps the most hostile environment on earth, at least to us - a world of crushing pressure, brutal cold and utter darkness. We have barely begun to explore it, and yet it is the largest living space on the planet. Scientists already think that there is more life in the deep than anywhere else on earth.

The deep is perhaps the most hostile environment on earth, at least to us - a world of crushing pressure, brutal cold and utter darkness. We have barely begun to explore it, and yet it is the largest living space on the planet. Scientists already think that there is more life in the deep than anywhere else on earth.

Corals build themselves homes of limestone in the warm, clear, shallow seas of the tropics. Their reefs occupy less than one tenth of one per cent of the ocean floor, yet they are home to a quarter of all known marine species.

Corals build themselves homes of limestone in the warm, clear, shallow seas of the tropics. Their reefs occupy less than one tenth of one per cent of the ocean floor, yet they are home to a quarter of all known marine species.

The big blue is the world's greatest wilderness, far from shore and many kilometres deep. It's a vast marine desert where there is little to eat and nowhere to hide.

The big blue is the world's greatest wilderness, far from shore and many kilometres deep. It's a vast marine desert where there is little to eat and nowhere to hide.

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.

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 live here must find ingenious ways to cope with two very different worlds.

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 live here must find ingenious ways to cope with two very different worlds.

While making Blue Planet II, we have explored parts of the ocean that nobody has been to before, encountered extraordinary animals and discovered new insights into how life thrives beneath the waves.

While making Blue Planet II, we have explored parts of the ocean that nobody has been to before, encountered extraordinary animals and discovered new insights into how life thrives beneath the waves.

This extended special of the nature documentary series journeys from the equator to the unexplored depths, meeting the best-loved characters from the series.

This extended special of the nature documentary series journeys from the equator to the unexplored depths, meeting the best-loved characters from the series.

The film also uncovers the disturbing story of how shipping noise is deafening whales and dolphins, affecting their survival in the future.

The Finnish construction of cruise liner Freedom of the Seas, which was launched in 2006 and, at 18 storeys in height and a quarter of a mile in length, is the largest in the world. As cameras show the many features such as the surf park and ice rink, experts investigate whether at 160,000 tonnes this is the maximum size ocean-going technology will reach before having too great a mass to float

Documentary granting a unique and privileged access into the magical world of whales and dolphins, uncovering the secrets of their intimate lives as never before.

This episode explores the intimate details of the largest animals that have ever lived on our planet - the great whales. From the balmy waters of the Indian Ocean to the freezing seas of the Arctic, two daring underwater cameramen - Doug Allan, Planet Earth's polar specialist, and Didier Noirot, Cousteau's front-line cameraman - come face-to-face with fighting humpback whales and two-hundred-ton feeding blue whales.

Humans have long wondered if the universe may harbour other intelligent life forms. But perhaps we need look no further than our oceans?

Whales and dolphins are nature's supreme vocalists, with a repertoire to put an opera singer to shame. The mighty sperm whale produces deafening clicks in its blowhole which it uses to locate giant squid two miles down in the ocean abyss, while migrating narwhals use similar sounds to pinpoint vital breathing holes in Arctic ice-floes.

Four marine experts explore the planet's greatest wilderness - the oceans. They reveal the hidden stories of the deep through archaeology, geology, marine biology and anthropology.

The team investigates why parts of the Southern Ocean are warming twice as fast as the rest of the world's oceans and looks at the impact of this phenomenon.

The team explores the remote and unexplored Southern Red Sea, teeming with marine life and home to some of the warmest waters on the planet.

The team explores a corner of the Atlantic Ocean. This ocean is the youngest of the great oceans and critical in influencing our climate.

In the first of two episodes in the rich tropical waters of the Indian Ocean, the team explore its remote and pristine underwater worlds.

The team explores the coastal waters of the Indian Ocean to discover what happens when the powerful Indian Ocean collides with the edge of a continent.

The team embarks on an expedition to explore the profound effect that man is having on the Mediterranean Sea. Western civilisation developed around its shores, but now human activity is threatening to destroy it.