Continuity mistake: When Mike is repainting a striped beach-house, he turns to see his friends riding a catamaran, and he then turns and makes a big splodge with his brush on the second stripe from the side, on the beach-house. In this shot note the shape of the paint on this stripe. After Chief Brody rings the bell because he thinks he sees a shark, he begins to climb down the watch tower, and it then cuts to a shot of Mike standing in front of the beach-house - and now the shape of the paint-marks are different - they are lower and smaller. (00:42:35 - 00:44:50)
Continuity mistake: When Terry is water-skiing, her mum is driving the speedboat. The speedboat has the writing "MS 5713 EB" on both of its sides. The sides of the boat are made up of shiplap boarding. In the first half of the skiing scene when we see the side of the speedboat, the writing is printed on the second board down from the top of the boat. However in the second half of the scene, after Terry has been grabbed by the shark, the writing has moved up onto the top board. The condition of the paint of the actual whole boat changes between a few shots too. Sometimes the green paint is totally fresh and new looking, in others it is faded and looks more worn. (00:18:40 - 00:20:25)
Continuity mistake: At the beginning of the film when the shark attacks the divers, you see in one shot that the shark already had a burned scarred face. The shark doesn't get set alight until later in in the film. This scene was one of the last ones to be filmed.
Continuity mistake: When Hendricks enters Chief Brody's office with the diver's camera, the camera is old and very darkish brown, and the middle circular lens has an inside lightbulb-fitting, and the large black torch attached to it is worn and slightly damaged. Yet in the shots of Hendricks saying "Dance?," he is holding the same camera, you can clearly see it is different. The camera is more lighter in colour, the inside lightbulb-fitting from the the middle circular lens has vanished, the black torch is more new-looking etc., (00:15:10)
Continuity mistake: When Brody and Ellen are talking about Mike being seventeen and should have a summer job we see Brody placing his arm on the side of the door entrance. When it cuts to a close-up from behind Brody you can see he has lowered his arm so the camera can get a clean shot of Ellen's face. When it cuts he has his arm back up. (00:25:40)
Continuity mistake: When the teenagers are near Cable Junction on their wrecked boats, they see Chief Brody coming towards them on the Police Boat. We then see a close-up of Brody, and from his view he is approaching Cable Junction and the teenagers from front-on, with the teenagers on the right. When we see Brody approaching them as seen from Cable Junction, he approaches them from a completely different direction. He comes from behind them as if he approached from a different side of the island.
Continuity mistake: In the scene where Chief Brody comes home drunk, Deputy Hendricks comes over to express his sorrows. When he's leaving/already left, Both Ellen & Chief Brody comment on Hendricks as "Poor Jeff." In the first Jaws film, Brody calls him Lenny. Jeff is actually the first name of the actor who played Hendricks.