Trivia: Quint's boat is named Orca. The orca is the only natural predator the great white shark has (besides humans).
Trivia: In the novel, Quint dies differently. He is stabbing the shark with a harpoon. He then gets tangled in the harpoon rope and is yelling to Chief Brody to give him the knife. Quint then gets dragged underwater by the shark and drowns. This is similar to the death of Captain Ahab in Moby Dick.
Trivia: The name Ben Gardner comes up in the film when Brody asks if Ben caught the tiger shark, and when Brody and Hooper find Ben's battered boat (which leads to Hooper seeing his severed head), though Ben is never introduced in the film. Ben does make two unidentified appearances while alive. When Hooper arrives in Amity, Ben is the first man to greet him at the dock, and at the start of the shark hunt Ben is the first man shown in a moving boat, as he complains about the other fishermen.
Trivia: When the three guys are out on the boat in the dark looking for the shark, a meteor shoots past Roy's right shoulder - this meteor was a real one. In the next few frames another meteor shoots across the top of the frame - this meteor was added in post-production.
Trivia: Brody's line, "You're gonna need a bigger boat", was actually a total ad-lib. The director wanted a real reaction to the shark popping up really close to him, so they didn't tell Roy Scheider that it was going to happen. It was a total surprise. Not only did he react naturally, it scared him so badly that he forgot the correct line. So, when he looked at Quint, he ad-libbed, and they left in the movie. (It was number 35 on the top 100 Most Memorable Movie Quotes list).
Trivia: Matt Hooper was originally supposed to die. After the infamous incident where the real shark was caught in the wires above the miniature cage, the midget actor refused to go back in the water with it, meaning the filmmakers had to rewrite the script for Hooper to survive.
Trivia: When Mrs Kintner sees Chief Brody at the dock, she says "Chief Brody?" and slaps him. Roy Scheider was actually hit in the face, as Lee Fierro was apparently unable to fake the slap.
Trivia: The shark doesn't make its first full appearance until 81 minutes into the movie, and only has four minutes of screen time.
Trivia: When the girl is being attacked, she seems to do an incredible job of acting in pain. The thing is, she is not acting. The scene was done with divers under the water pulling the actress with ropes, hard enough to bruise her.
Trivia: Richard Dreyfuss initially turned down the role of Hooper, but after worrying that no one would hire him after his performance in the film "The Apprenticeship of Duddy Kravitz", he immediately called director Steven Spielberg and asked for the part back.
Trivia: Sterling Hayden was the original choice for Quint, but Hayden's tax problems with the US Government prevented him taking the role.
Trivia: Steven Spielberg has referred to Bruce as being a "floating turd" in interviews. You can see his point when you see the shark in full length for the first time.
Trivia: Throughout the movie the color yellow runs as a theme. Yellow is known as a color that sharks can actually see, which is why lifeboats should not be painted in that color.