Anja and five friends join anthroplogy student, Dace, on a journey to study a remote, ancient rock painting. Their excitement vanishes when Mel becomes delirious after skinny-dipping in the waterhole. Feverish, bleeding, confused, she physically and mentally regresses to a vicious predatory state. Mel has gone primal. Mel’s lover and friends realise they are the prey as she savagely hunts them down. Before they can escape another one of them starts to regress, posing a hideous choice; kill their friends or be killed by them. Their only hope of survival is through a cave, where Anja learns too late the meaning of the ancient rock art they came to study.

A skeptical news reporter is invited by the CEO of Nexecon Petroleum to document the safety of Colossus, the largest drilling and refining platform ever constructed. As the powerful drill tears through the seabed, a fissure forms, revealing a hidden mirror ocean teeming with prehistoric life. When a team is sent to access the damage, it comes face to face with the most powerful oceanic predator that ever lived: Carcharodon Megalodon.

An elderly woman, confined to a nursing home, is about to celebrate her birthday. While the cold-blooded staff celebrates her birthday in advance, the radio announces the escape of the extremely dangerous killer known as "El Matarife" from a mental hospital. El Matarife—whose connection to the woman is closer than it seems—will unleash a massacre in the nursing home to deliver a very special gift to her.

The U.S. Navy's special group "Blue Water" builds a half-shark, half-octopus for combat. But the sharktopus escapes and terrorizes the beaches of Puerto Vallarta.

A young girl sent to live with her father and his new girlfriend discovers creatures in her new home who want to claim her as one of their own.

Four teenage girls go on a diving adventure to explore a submerged Mayan city. Once inside, their rush of excitement turns into a jolt of terror as they discover the sunken ruins are a hunting ground for deadly great white sharks. With their air supply steadily dwindling, the friends must navigate the underwater labyrinth of claustrophobic caves and eerie tunnels in search of a way out of their watery hell.

A couple on a romantic getaway find themselves stranded at sea when a tropical storm sweeps away their villa. In order to survive, they are forced to fight the elements, while sharks circle below.

The crew of an experimental underwater nuclear base are forced to struggle for their lives when their explorations disturb a creature who threatens to destroy their base.

After an earthquake destroys their underwater station, six researchers must navigate two miles along the dangerous, unknown depths of the ocean floor to make it to safety in a race against time.

A giant thirty-five-foot shark becomes trapped in a SeaWorld theme park and it's up to the sons of police chief Brody to rescue everyone.

When a 35-foot great white shark begins to wreak havoc on a seaside town, the mayor, not wanting to endanger his gubernatorial campaign, declines to act, so a local shark hunter and horror author band together to stop the beast.

A great white shark hunts the crew of a capsized sailboat along the Great Barrier Reef.