Steven Spielberg, 1975. The shark you don't see. Birth of the summer blockbuster.
From Wikipedia
Jaws is a 1975 American thriller film directed by Steven Spielberg, based on the 1974 novel by Peter Benchley. It stars Roy Scheider as police chief Martin Brody, who, with the help of a marine biologist and a professional shark hunter, hunts a man-eating great white shark that attacks beachgoers at a New England resort town. Murray Hamilton plays the town's mayor, and Lorraine Gary portrays Brody's wife. The screenplay is credited to Benchley, who wrote the first drafts, and actor-writer Carl Gottlieb, who rewrote the script during principal photography.