Movie where people study sharks

Police chief Brody must protect the citizens of Amity after a second monstrous shark begins terrorizing the waters.

When the seaside community of Amity finds itself under attack by a dangerous great white shark, the town's chief of police, a young marine biologist, and a grizzled hunter embark on a desperate quest to destroy the beast before it strikes again.

While surfing on a secluded beach, Nancy finds herself in the feeding grounds of a great white shark. Though stranded only 200 yards from shore, survival proves to be the ultimate test of wills, requiring all of her ingenuity, resourcefulness, and fortitude.

After waking up alone by a backwoods lake next to a ring buried in the shore line, business man Jeff Sinclair is faced with not knowing what he did the night before or the story of whose ring he took.

Researchers on the undersea lab Aquatica have genetically altered the brains of captive sharks to develop a cure for Alzheimer's disease. But there's an unexpected side effect: the sharks got smarter, faster, and more dangerous. After a big storm damages their remote research facility, they must fight for their lives.

The wife of a British Judge is caught in a self-destructive love affair with a Royal Air Force pilot.

A weekend cruise on a luxurious party yacht goes horribly wrong for a group of old high-school friends when they get stuck in the water many miles from shore and a happy reunion turns into a fight for survival.

Two divers are left out at sea without a boat. There’s nothing but water for miles, unless they look at what’s underneath them...

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.

Two sisters on Mexican vacation are trapped in a shark observation cage at the bottom of the ocean, with oxygen running low and great whites circling nearby, they have less than an hour of air left to figure out how to get to the surface.