Continuity: In the scene where Hooper is measuring the bite radius of the Tiger shark, he puts his measuring tape away more than once.

Continuity: When Quint slowly clips his harness to the fishing reel, the reel has a brushed chrome dull finish. However, in the previous and following shots, although the reel style is the same, the reel has a highly polished mirrored chrome finish.

Continuity: The cleats are entirely different in many shots; they keeps changing from flat top, long, shiny silver with a wide base, to curved top, dull silver with a narrow base. When Brody unties the wrong line and when he wets the fishing reel it is the shiny flat top cleat on the transom. Yet, when he and Hooper tie off the lines the cleats are curved top. Also, the two metal plates and two metal hoods that are near the cleats repeatedly change from being very rusty, to not rusty at all.

Continuity: While Quint makes his offer at the town meeting, when he says, "I don't want no volunteers, no mates...," the chalkboard is beside him in this close-up. The doodle of the shark on the board, and the actual wood grain of the chalkboard frame all differ from the previous shots.

Factual error: After the shark tries to attack Brody on Orca, it swims backwards out of the cabin, just as it does in other shots. No shark can swim backwards.

Continuity: In the scene where Hooper visits Brody's home, he brings two bottles of wine. Brody pours himself a large measure, and then gives his wife and Hooper some. If you look at the bottle a) it seems rather full for the amount he's just poured, and b) the level changes from shot to shot. Sometimes it's above the label, sometimes below.

Continuity: In the scene where Brody blows up the shark, off in the background there is land in some shots and then no land in others. At one point, there is land about half way across the horizon, then there is land across the whole horizon, and then no land, it varies shot to shot.

Factual error: When the woman is yelling that the shark is in the pond, it shows the shark's dorsal fin and tail fin sticking out of the water. The tail fin is moving straight. If the shark needs its tail to swim, wouldn't the tail fin be moving side to side?.

Continuity: After the Orca breaks down for good, Hooper goes into the shark cage to try to kill the shark. The shark proceeds to completely trash the bars on one of the sides. After Hooper escapes to the sea bottom, the shark is attacking the top of the cage, but the bars are now intact. [Extra info: The scene with the bars intact actually shows a very real shark that got caught in the line(s) holding the intact cage. When they raised the cage it was still caught in the line(s). They inserted this footage after the scenes with Hooper and Bruce where the cage got trashed.]

Continuity: In one of Richard Dreyfus' first scenes, Brody asks him to help with the group of men crowding into a small boat. Hooper says that the officer wants him to tell them that they're overcrowding the boat. They show the men climbing in and there's a guy in a blue jacket climbing down the ladder into the boat. He waves his arm and says "what do you care?" They then show Hooper asking if they know a good restaurant or hotel on the island. When they show the men again, uttering the line "Yeah, walk straight ahead," the man in the blue jacket is on the deck again and is again descending down the ladder.

Continuity: The knots on the supporting rigging lines aboard Orca keep changing in consecutive shots, within the same scenes.

Continuity: While Brody watches the woman in the water, before Alex is attacked, there is a blue and yellow raft in the cabana behind him. In the close-up of his face, just before Harry's black capped head pops out of the water, the raft is gone. Then when Ellen massages Brody's neck the raft is back. The cooler and other assorted items change position between shots as well.

Audio problem: Alex asks his mom if he can still go in the water, and when she says, "Just ten more minutes," although it is a side shot of her face, it is easy to see that her mouth movements are not in sync with her words.

Continuity: Hooper runs into the very thick black-smoke filled cabin to go below deck, but in the next interior shot the entire cabin is bright and there is hardly any smoke anywhere.

Continuity: When Quint shouts for Hooper and Brody to get their gloves on, in the wideshot Hooper starts to slip his left hand into his left glove. However, in the close-up, he just starts to put his right hand into the right glove.

Revealing: When Chief Brody starts shooting the shark, his cartridge is missing.

Continuity: On the Orca near the end of the film, there is a shot of Quint aiming the harpoon gun. In this shot the harpoon gun is high, but in next shot he is shooting from the hip.

Continuity: The word ORCA on the back of the boat continually changes from shot to shot varying from very rusty letters to shiny letters.

Audio problem: When the old fisherman yells at his friend to swim faster and not to look back, his mouth movements aren't consistent with what he is saying.

Continuity: When Quint gets bitten by the shark, he spits out blood. The blood on his face and chin noticeably changes in consecutive shots.