At Aquatica, a remote former submarine refueling facility converted into a laboratory, a team of scientists is searching for a cure for Alzheimer's disease. Fluids from the brain tissue of three Mako sharks are being harvested as a cure for Alzheimer's. Unknown to the other scientists, Dr. Susan McAlester (Saffron Burrows) has violated the code of ethics and has genetically engineered the sharks to increase their brain size, but this has the side effect of making the sharks smarter and more dangerous.
The coastal town of Hampton Bay is threatened when a 35-foot great white shark starts chomping up their vacationers. Days before the annual Regatta celebration, the townspeople are faced with financial ruin if something isn't done about their newfound shark problem. If that wasn't enough, the owners of the local amusement park have been subject to a hostile takeover from a prospective businessman looking to cash in on their prized property. It's then up to the sheriff, the park's owner, and a shark expert to head out and kill the shark before the summer economy is slashed and the park is demolished.
Tim est chasseur de serpents. Son job : capturer les serpents Corail, le plus redoutable des prédateurs du Pacifique Sud, afin d'en extraire le venin qui sera revendu à prix d'or à des laboratoires pharmaceutiques. Dak, responsable de l'équipage du bateau, connait bien ces serpents. Sensible au charme de Andi, la femme de Tim, il devient violent et menaçant. Il pourrait utiliser les reptiles contre son rival...
London-based gangster George Thomason and his right-hand man, Ken Pile, an animal lover with a bad stutter, plan a jewel heist. They bring in two Americans to help: con artist Wanda Gershwitz and "weapons man" Otto West, a loud-mouthed Anglophobe who fancies himself an intellectual and hates being (correctly) called stupid. Wanda and Otto are lovers, but they hide this from George and Ken, pretending to be brother and sister, so Wanda can work her charms on them. The robbery goes well, and the thieves get away with a large sum in diamonds. However, they are briefly spotted during their getaway by Mrs. Coady, an elderly lady walking her three dogs. The group then hide the loot in a safe in an old workshop. Soon after, Wanda and Otto betray George to the police and he is arrested. They return to collect the loot, with Wanda planning to double-cross Otto as well, only to find that George has moved it. Wanda decides to seduce George's barrister, Archie Leach, so that he can persuade George to plead guilty and give up the location of the diamonds. Unhappily married, Leach is brow-beaten by his vindictive wife, Wendy, and spoiled daughter, Portia, and he quickly comes under the spell of Wanda's charms.
On Amity Island, Chief Martin Brody (Roy Scheider), the hero of two previous shark attacks, has died from a heart attack. His wife, Ellen (Lorraine Gary), attributes it to the fear of sharks. She now lives with Brody's younger and more obedient son Sean (Mitchell Anderson) and his fiancée Tiffany (Mary Smith). Sean works as a police deputy and is sent to clear a log from a buoy a few days before Christmas. A massive 25-foot great white shark attacks him, severing his arm, then pulling him underwater and killing him.
The film takes place along a stretch of coastline somewhere in Florida in the United States, where a local tourist spot has become plagued by a mysterious marine creature. Little do they know, the monster is the product of a secret military experiment — a genetic hybrid mutated from a common octopus and the prehistoric super-predator Dunkleosteus. Unfortunately, the creature has broken loose, and is now feeding on swimmers and tourists swimming or sailing along the coast. Also, the monster is only an infant, and will continue to grow if it is left to hunt much longer.
A great white shark follows a team of water skiers. The driver stalls the ski boat but manages to restart it before the shark can approach. The shark follows the water skiers into the SeaWorld park and throws the gate off its rails while it is closing. Meanwhile, Florida announces the opening of SeaWorld's new glass covered underwater tunnels that allow close up views of the park's animals.
While wind surfing near the seaside community of Port Harbor, a young man is killed by a giant Great White Shark. Author Peter Benton and professional shark hunter Ron Hammer realize the truth, but ambitious governor William Wells refuses to accept that a shark threatens their community. Fearing that a canceled wind-surfing regatta would derail his gubernatorial campaign, Wells has shark nets installed. But the sounds of teenagers splashing in the surf leads the shark to rip through the nets. The next day, the shark plows through the wind surfers, knocking them off their boards. But rather than eat the scattered teenagers, the shark targets the governor's aide and eats him.
Prior to a new hotel opening on Amity Island, a huge great white shark ambushes two divers who are photographing the wreck of the Orca, the late Quint's boat. A few days later, the shark devours a water skier. The speedboat driver defends herself by dumping gasoline on the shark (accidentally spilling some on herself) and shooting it with a flare gun, causing the boat to explode. The shark escapes but is severely scarred.
Dans un petit port de Floride, la vie des habitants est tranquille, jusqu'au jour où des barracudas attaquent les plongeurs. Confronté à l'agressivité des habitants, le biologiste Mike Canfield découvre d'une usine chimique déverse dans l'océan une substance qui développe considérablement l'appétit de quiconque l'ingère. Mais ce secret-là est jalousement gardé par quelques hauts fonctionnaires commanditaires d'un programme de recherches classé confidentiel et ne doit donc pas être rendu public. En suite, l'enquête se perd, abandonnant les recherches et le film plonge dans une magnifique histoire d'amour qui commencera à énerver un certain Akira Kimonodedjudo...
While a group of teenagers are having an evening beach party on Amity Island, Chrissie Watkins (Susan Backlinie) goes skinny dipping in the ocean. Something violently grabs and pulls her underwater. In the morning, Deputy Hendricks (Jeffrey Kramer) finds her remains on the beach. Upon hearing from the medical examiner that the cause of death was a possible shark attack, Police Chief Martin Brody (Roy Scheider) proceeds to close the beaches, but Mayor Larry Vaughn (Murray Hamilton) overrules him, fearing news of a shark attack will ruin the summer tourist season, the town's primary revenue source. He rationalizes that there have been no prior shark problems in the area, and theorizes the girl was killed in a boating accident. The coroner concurs and Brody reluctantly accepts their conclusion.
Reynolds plays Caine, a gunrunner who becomes stranded in a small port in the Red Sea. He meets a seductive woman who propositions him to dive into shark-infested waters off the coast for scientific research. However, when Caine realizes the woman and her partner are actually treasure hunters, the action starts to heat up both above and below the water.