The movie Tentacles was released in 1977 and was directed by Ovidio G. Assonitis. It starred John Huston, Shelley Winters, and Bo Hopkins in lead roles. The film was based on the real-life phenomenon of killer octopuses and was marketed as a thriller.
The movie is set in the coastal town of Santa Monica where a company named Trojan is constructing a new underwater tunnel. Soon after the construction, people begin disappearing, and their bodies are found washed up on the shore, gnawed to the bones.
Dr. Turner, a marine biologist, begins to investigate the cause of the killings. He suspects that the company's construction has caused pollution, which may have triggered the mutation of the octopus to giant proportions, making it dangerous.
Dr. Turner teams up with a local journalist, Ned Turner, to uncover the truth behind the mysterious disappearances. They find out that the company has been dumping toxic waste into the sea, which has caused the mutation and aggression in the octopus.
As more and more people fall victim to the monster octopus, Turner and Ned decide to take matters into their own hands and try to stop the creature before it wreaks any more havoc.
The film has a climactic end where the giant octopus confronts Turner and Ned as they try to stop it from causing more destruction. In the end, they manage to kill the creature by electrocuting it.
Tentacles received mixed reviews at the time of its release. However, it has since become a cult classic and is sometimes referred to as Jaws with tentacles.