At a Depth of Eighteen Meters

Giant Pacific octopuses are mystical creatures. A film team managed to gain insight into the mysterious life of these relatives of snails and mussels. It formed a close bond with the elusive squid while diving in the fjords of the Northeastern United States. In parallel, the dive team followed the evolution of the giant octopus Eleonora at Port Townsend Aquarium.

Deep Blue is a major documentary feature film shot by the BBC Natural History Unit. An epic cinematic rollercoaster ride for all ages, Deep Blue uses amazing footage to tell us the story of our oceans and the life they support.

A short distance from Marseille, at Cape Morgiou, in the depths of the Calanques massif, lies the Cosquer cave, discovered only about thirty years ago by a diver, Henri Cosquer. With its bestiary of hundreds of paintings and engravings - horses, bison, jellyfish, penguins - the only underwater decorated cave in the world allows us to learn a little more about Mediterranean societies 30,000 years ago. Today, threatened by rising water levels accelerated by global warming, this jewel of the Upper Paleolithic is in danger of being swallowed up. To save the cave from disappearing, the Ministry of Culture has chosen to digitize it. From this virtual duplicate, a replica has been made on the surface to offer the public a reconstruction that allows them to admire these masterpieces.

Peter Snow presents highlights from today's three deep-sea dives around the world. In 2002 BBC organized three concurrent dives , first in Monterey Bay where unmanned submersible is lowered into underwater canyon which is over mile deep. Second dive is in Grand Cayman where submersible Atlantis will explore life at the spectacular Cayman Wall , Kate Humble reports . During the dive, the crew used bait to attract a deep-water giant, the six-gill shark. Third dive takes place in middle of the Atlantic 1200 miles west of Portugal, which is also deepest of the three dives, divers will descent in Russian submersible Mir from research vessel Keldish and the Mir will dive in the bottom of the ocean in 2300 metres .

Sea life in a whole new way. Deep Sea 3D, an underwater adventure from the filmmakers behind the successful IMAX® 3D film Into the Deep, transports audiences deep below the ocean surface. Through the magic of IMAX®; and IMAX 3D, moviegoers will swim with some of the planets most unique, dangerous and colorful creatures, and understand this inspiring underworld.

The NHK team that captured the world's first footage of a live giant squid in its natural habitat is setting out for another deep-sea adventure. They will give us a look at the amazing life forms with luminous bodies that have survived the harsh, pitch-dark deep-sea environment of the Pacific.

For eight centuries, between the 9th and 1st century BC, the Etruscans, inhabitants of the Italian peninsula, were one of the most powerful peoples of the Mediterranean basin, and when they disappeared they left behind impressive necropolises, vestiges of sanctuaries and even entire cities. How did they attain such power? How far did they extend their dominion and influence? What were the causes of their decline?

Making-off from The Big Blue movie

David Attenborough looks into the ocean's depths to discuss the coelacanth, a primeval fish hidden for 400 million years. Its mysterious movements reveal vital clues about life's journey from sea to land, as well as secrets of evolution and survival.

Video diary from behind the scenes of 2002's "Cruise of the Gods."

Groundbreaking documentary which follows a Japanese-led team of scientists as they attempt to shed light on the mysterious world of deep sea sharks. Only 50 specimens of the newly discovered 'megamouth' have ever been sighted. Over four years, scientists and film crews voyaged in midget submarines into the depths of Suruga Bay and Sagami Bay to film them. Prehistoric 'living fossil' sharks such as bluntnose sixgill sharks, goblin sharks and frilled sharks also lurk in the depths. As part of the investigation, a sperm whale carcass was placed at the bottom of the sea to attract these sharks, which were then studied and observed from the submersible vessels. Revealing in detail the previously unknown behaviour of deep sea sharks, the film unravels another of the intriguing mysteries of our planet's biodiversity.

Described as being a film about determination, danger and the ocean’s greatest depths, James Cameron's "Deepsea Challenge 3D" tells the story of Cameron’s journey to fulfill his boyhood dream of becoming an explorer. The movie offers a unique insight into Cameron's world as he makes that dream reality – and makes history – by becoming the first person to travel solo to the deepest point on the planet.

James Cameron teams up with NASA scientists to explore the Mid-Ocean Ridge, a submerged chain of mountains that band the Earth and are home to some of the planet's most unique life forms.