Revealing mistake: When the megalodon attacks the yacht the party goers jump off the yacht, and some of them reach the large round safety raft. To the raft's right, there is a visible yellow line attached to it so it doesn't drift away for the shots.
Revealing mistake: When the megalodon appears, Ben shoots a flare into the sky, which catches the attention of Hector who is flying in the chopper. In the exterior shot of Hector's reaction, there is a reflection of a fence on the side of the chopper, even though Ben signaled for help while out in the ocean.
Revealing mistake: When the shark knocks the Apex yacht, the camera moves violently and people act as if they lose their balance, but the champagne in their glasses doesn't spill a drop.
Revealing mistake: When the boat sinks, the shark eats a boat and, seconds later, two men in the water. For both scenes, the same footage of the shark coming out of the water and moving its jaws is used.
Revealing mistake: After Ben picks up the lobster and the shark tooth, he gets in a boat that starts to turn around. The close-up of him shows the background still.
Revealing mistake: While the shark eats the raft with the people in it, the whole raft, including its inside, has been deleted except for its border.
Revealing mistake: The shot of the shark opening its mouth to eat the politician from the yacht is the same one used for when Ben and Cat where climbing the rope to get on the helicopter.
Revealing mistake: A man is seen trying to fish a swordfish. When the angle changes to that of the fish, the sky is totally different.
Revealing mistake: The shark attacks the parasailing boat and makes the driver hit his head against a rail and fall unconscious. First of all, the bang of his head is not heard. Second, his hit and further fall are one of the worst stunts in movie history.
