Shark Swarm

When a ruthless real estate tycoon poisons the water in a seaside bay to destroy the fishing economy, he doesn't count on the chemicals having an adverse effect on the resort's shark population. The predators are transformed into blood-thirsty killers with a taste for human flesh, and it is left to a group of local fishermen to hunt the deadly creatures before any of the local residents meet a gruesome demise. Thriller, starring John Schneider and Daryl Hannah