Régalec, premiers contacts avec le poisson roi

Exploring an unknown world 10,000 m beneath the waves. After capturing a giant squid on film, NHK's deep-sea film crew explores our planet's deepest point The Mariana Trench is nearly 7 miles deep. The water pressure is immense, and it's a world that's long been out of our reach. What creatures could survive such hostile conditions? This is an expedition to explore the earth's deepest frontier. Narrated By David Attenborough.

Explore the mysterious giant rings of the Mediterranean, buried at a depth of 120m, with the world-famous Laurent Ballesta, world-renowned diver and his team, to understand the origin of these unique and unknown formations.

Shark expert Neil Hammerschlag and a crew of researchers search for an elusive hammerhead shark.

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.

The Mediterranean. Because people have been travelling there for thousands of years, it is believed to be without secrets. And yet, far below its surface, lie vast unexplored territories, luxurious gardens worthy of the finest tropical coral reefs. These natural wonders are inaccessible to the traditional diver, in a twilight zone, between 60 and 120 m, where there’s less than 1% of sunlight. If diving at such depths is always a challenge, staying there is a fantasy, a utopia that becomes reality in Planet Mediterranean. In the tradition of Commander Cousteau and his "houses under the sea," the team of diver-photographer Laurent Ballesta is undertaking a new world-record setting mission in complete freedom and without time limit.

Jacques Cousteau's 1942 plunge into the Mediterranean sea

Deep sea: 1000m below the surface no light, immense pressure and icy temperatures. The deep sea encompasses more than 90% of the planets habitat. Yet we know less about these depths than about the moon. This film documents the technical, scientific, and ecological challenges of deep sea researchers. Scientists work worldwide together to collect data on the physical state of the upper ocean. With more than 3000 autonomous floats they monitor the oceans for influences on weather systems like El Nino or the monsoon. Does it affect global climate change? Does the deep sea offer solutions for the CO2 issue? Researchers in the Okinawa Trough are trying to find out. The sea floor harbors enormous amounts of resources: oil, natural gas, methane. Scientists work hard to try and locate these materials. Millions of deep sea dwellers are waiting for their discovery. The Census of Marine Life is trying to catalogue these bizarre ocean creatures before they disappear.

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.

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 .

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.

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.

Extreme der Tiefsee - Abysses

Fascinating underwater documentary filmed with hand-held cameras by frogmen and mostly filmed in deep-water seas from within a special designed batiscaff, by the Cousteau family of sea explorers. Preserved by the Academy Film Archive in 2010.

An expedition looks into whether Titanic's hull had a construction design flaw that caused her to break apart. Featuring advanced CGI technology, archive documents and photographs, as well as footage from the modern-day History(R) expeditions, "Titanic's Achilles Heel" is a remarkable journey into the ongoing legacy of a ship that continues to capture the world's attention.

The hunt for a mythic animal once thought to have been extinct for 65 million years: the coelacanth. It can be found 120 metres beneath the ocean off the wild coast of South Africa. French scientists and South African scientists teamed up with experienced Trimix divers, including Peter Timm, who discovered the coelacanths in Sodwana Bay in 2000 and award-winning underwater photographer Mr Laurent Ballesta and his advanced technical dive team to bring you this eye-opening documentary. Click on the play button above to watch a preview.

From shipwrecks to seafloor species, NOAA oceanic scientists work to unlock the secrets of our oceans.

Whether it's the biggest great white, the most photographed tiger shark, or the shark known for jumping 100 feet up out of the water, we're diving into the stories of the greatest shark stars of all time.

Acid Horizon follows marine ecologist Dr. Erik Cordes on a harrowing deep-sea expedition to track down the "supercoral", a strain of the deep-water coral Lophelia pertusa that seems to possess the unique genetic capability to thrive in a low-pH ocean.

Documentary exploring the hundreds of species of life that thrive in total darkness at the hydrothermal vents along the Mid-Ocean Ridge, several miles below the ocean surface. Little food filters down from the surface and there is no sunlight to support photosynthesis.

Exploring hydrothermal vents, cold-seep habitats, and food-falls including whale-falls and the communities at shipwrecks