Continuity: As soon as the three survivors are coming out of the lab through the hatch underwater, they all signal each other to rise to the top. Look at Safron Burrows, her cheeks are full of air and you can almost see the surface above her head. You can also see the exact same shot when she is about to be eaten by the last shark. And what's with that hand gesture - to cut or for the shark to stop?

Revealing: At the end of the film, when Preacher is fighting the shark, we can see that it is a white stuntman doing the scene for LL Cool J.

Revealing: When the sharks first attack and bite off the man's arm - you can clearly see his arm under his shirt as he's scrambling away from the water.

Continuity: In the scene where L.L. Cool J. is in the flooded kitchen and the shark comes in through the door, he climbs up a shelf then falls in the water then climbs out again. Before he makes his way to the oven you can clearly see that under his pants he is wearing knee pads.

Revealing: Near the beginning when the boat pulls up and the guy on the boat tells the blond-convict fella he's got a beauty 13 foot "Tiger shark" that's up in some sort of sling, the so called tiger shark is actually an animatronic great white with stripes on it. Tiger sharks have a blunt rounded nose, not a pointed one like a great white.

Continuity: Towards the end of the movie, the character played by L. L. Cool J stabs the shark through his left eye with his cross, yet in the next scene where the shark returns to eat the female doctor his eye is clearly intact.

Factual error: A double oven has a double or triple insulating wall between ovens, not a single sheet of flimsy steel.

Revealing: In the shot when the helicopter is about to crash into the building, take a look at the blade. There is a wire holding the helicopter.

Factual error: Sharks can swim quite fast (some up to 65kmph). How does Preach, wading at a relatively slow speed, escape the shark the first time he sees it?

Factual error: Since the water was always waist high, how could the huge sharks swim inside? Not to mention the corridors...

Continuity: When the shark is brought up to put the needle in his head he bites off the guys arm leaving only a bit left there, yet when they are wheeling him to the helicopter you see that he's got more arm than before.

Continuity: When the shark first smashes the glass with the gurney carrying the man who was first bitten who failed to escape on the helicopter, he releases the gurney about 50 feet away from the glass. How could the gurney maintain its speed underwater?

Continuity: While Carter is trying to save Jan he is a few feet above the water. But in a shot from above you can see that he has to bend his body so as not to touch the surface. It would be very easy for him to reach her, then! But in the next shot, he's high above the water again.

Continuity: When McAlister cuts herself and jumps into the water, you see blood in the first shot. Then when she is swimming and wading etc., there is completely no sign of blood at all.

Revealing: When Samuel L. Jackson is attacked and killed by the shark, you can clearly tell that he is CGI. His arms and legs are segments and it looks really corny.

Continuity: The man with the cross has a wound on the left hand side of his head.  Later in the movie it has moved down.

Continuity: When the shark rises above water with Jan partially in its mouth, its teeth are in about the level of her waist. As Carter grabs onto Jan, it moves its teeth up to the top of her chest. In the wide shot that follows, though, its teeth are back at her waist, then in the last shot of her being pulled underwater, they are up way higher again, at her chest.

Factual error: The so-called 'tiger shark' fed to the Makos is quite unrealistic. As someone already mentioned, the snout is that of a Great White. Furthermore, the teeth are that of a Mako. Tiger shark teeth are very distinct; they resemble a cross between a dagger and a saw blade.

Continuity: When Carter climbs the ladder to get out of the water after removing the licence plate from the shark's mouth, it shows a shot of his feet and he is wearing sandals. In the tank he was wearing swim fins. He talks to the big boss for a few seconds and the fins are nowhere to be seen. He then walks away with the fins in his hand.

Continuity: Near the end scene, when the three characters came to the surface, L.L. Cool J. was taken by the shark. When he was taken underwater and when he surfaced, the shark had him in her mouth on the right side. When they went under again and resurfaced, L.L.Cool J. was on the left of the shark's mouth. What? Did the shark not like him on the right side so she switched him underwater?