there is a hige fish from called megladon, undersea research center

In a certain biological research institute in the Pacific, a breakthrough was made in the latest fish accelerated reproduction

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.

Biologist Zeb Hogan is in search of some of the largest fish on earth. Using many methods of fishing to catch the giant fish he is in search of and Often finds himself in exotic environments.

Josh travels across Mexico and South Africa to find fossilized traces of the Megalodon. Joined by shark experts, he goes diving to learn what it might have been like to encounter the ancient giant shark.

Experts search for a big mako terrorizing the shores of Southern California to determine if it could be the spawn of a legendary shark, The Beast.

Is an 18-metre prehistoric shark named Megalodon still out there? Sightings of massive sharks around the world suggest to some that it's possible.

Scientific buoys immersed deep in the sea off the French Riviera reveal the secrets of the giant oarfish: the creature most likely to be behind the myth of the Sea Serpent.

A spike in attacks on sea lions off the coast of Southern California sends shark researchers searching for an oversized, aggressive mako shark they believe could have family ties to the legendary record-breaking mako called "The Beast".