Trivia: When Brody gets fired and is drunkenly exiting the truck, entering his house, notice they have a yellow barrel as a planter at the front door - a nod to Quint's barrels.
Trivia: It was so cold throughout the filming that the actors' breath was visible in some scenes. In order to avoid this, the actors had to suck ice cubes before filming.
Trivia: During the filming, Roy Scheider didn't get along with director Jeannot Szwarc, and the two clashed frequently on set.
Trivia: At one point, the camera team filmed a scene where the teenagers were filmed from a distance calling for help. What the crew didn't realise was that the actors were really calling for help - a group of hammerhead sharks had begun circling their raft.
Trivia: At one point, the script had Ellen Brody going out to sea to rescue the kids. When producer Darryl F. Zanuck read the script, he looked at the writer and said "Over my dead body."
Trivia: The Cable Junction was a raft set anchored down offshore where they were filming. One night, the anchor chain broke off and the raft started moving. Director Schwartz was called that night and told that his island was floating towards Cuba.
