Visible crew/equipment: When Susan tries on a hat while the couple are shopping in the island town, you can see the cameraman in her mirrored shades. (00:06:00)
Audio problem: When the couple is flying to their vacation destination, they are in a Turbo-Prop aircraft. The sound affect used was from a piston engined aircraft.
Continuity mistake: During the scene in which the two main characters are diving, before the boat leaves them, Susan's snorkel swaps from the left side of her mask to the right and back again.
Continuity mistake: In one scene where the husband looks under water to see where the sharks are he gets startled and raises up out of the water. As his face comes up he removes his mask. The camera angle changes and in the next shot you see him removing his mask again. (00:50:20)
Other mistake: There are 20 divers counted onto the boat. They all head into the water in 2s, but somehow there is 1 person left without a diving buddy.
Audio problem: When the two submerge they are talking, but they have regulators in their mouths.
Continuity mistake: When Susan and Daniel are in bed, Susan puts her glasses on the table then turns around, and her blanket changes position between two consecutive shots. (00:07:30)
Other mistake: The couple are shown travelling on an American Eagle prop plane in the islands, but on-board you see them sitting together with another lady sitting on the left of Susan. The prop planes don't seat 3 together. This shot must have been filmed across the aisle on a larger jet. (00:03:25)
Continuity mistake: When Susan and Daniel are making out in bed she starts laughing and says "Nice face." You can see Daniel's nose is clean. When it cuts his nose is covered with face mask stains from Susan's face. (00:07:55)
Visible crew/equipment: When Susan says, "Where's the boat?" they are in the shadow of the camera boat.
Continuity mistake: When Susan says "I'm just gonna look, OK?" she puts the snorkel in her mouth, however in the next shot underwater, she has the regulator in her mouth, not the snorkel. (00:33:35 - 00:34:10)
Plot hole: It shows two air tanks missing on the boat. Now obviously when they get back to shore and all the tanks are put back, there would be two empty spaces, meaning hey, we forgot two people.
Suggested correction: True, but who says they didn't alert the authorities or return when they eventually realised it? Even if they did, the two divers drifted and were being stalked by sharks. It was set up earlier in the film when they showed their flawed way of tracking who went into the water and returned, so it makes sense that they overlooked what happened. There's also a scene when the boat returns where an employee notices two missing tanks, so they did notice it.
