Corrected entry: The pirate team is obviously very well-equipped and well-financed. They have obviously all worked together regularly before. Why then do they hire an unknown boat and crew to transport them? It seems more likely that they would buy a boat and use a crew that they knew they could trust, with the same attitude as the rest of them, not three people they had never met before, including an extremely flaky mechanic.
Corrected entry: In the scene where the characters are about to go underwater, two of the creatures come blasting through a corridor. If you freeze frame, you can see that one of the creatures goes right through a wall.
Corrected entry: Why, when the main character shoots out the Octopus' eye, doesn't it simply swallow him with its tentacles? Why would it give him all the time in the world to get a good shot straight into the pupil. No member of the Ottoia family would taunt its food in this manner.
Corrected entry: The first characters to get eaten are all swallowed at a reasonably fast rate. The tentacles engulf them within seconds. But, when the last army-guy wastes his bullet on Joey while being eaten, the tentacle takes at least 15 minutes to get up to his chest. If the creatures are "learning" (as it has been stated many times) shouldn't they have learned how to kill humans faster by now, since it is almost the end of the movie?
Corrected entry: When the Australian guy (I forget his name) is searching through the ship after he just heard some sounds, he is attacked by a tentacle and dragged down into a pipe. This pipe is too small for him to fit, so blood squirts out the sides. Yet, somehow his gun lands on the table in front of the main characters. This should not happen.
Corrected entry: In the end of the movie the cruiser is taking in a lot of water. The male key character is racing around the floors filled with seawater in a scooter. The water penetrates from a hole in the buttom of the cruiser. Finally he finds a hole in she ship where he can get out. When he leaves the cruiser he actually jumps down several meters, I just don't understand how the level of the water inside the cruiser can be about 10 meters higher than the sea level?
Corrected entry: Joey asks if it can "really get any worse" at one point in the film, and of coarse, it does; the power goes off (lights and everything). But later, the 2 characters are racing through the ship on a Jet-ski, they shoot an elevator button and the doors open. How does the elevator work without power?
Corrected entry: When the characters fall out of the elevator into the room filled with skeletal remains they all get freaked out and then they see the door at the end looking like its going to explode. This is the tentacles pushing up against the door and trying to get in. But, if the door is locked and it can't get in, then how did the remains of the crew/passengers get there. The creature must have some way of getting its arms into that room other than bursting down the door, so why doesn't it use it. Further more, later in the movie we see the tentacles shutting and locking the doors to force the characters to the front of the ship, so then why couldn't it just do this in the earlier scenes.
Corrected entry: The octopus creatures can rip through steel doors some times only when it is convenient for the screenwriter; often, they are stopped dead.
Corrected entry: When the pirates first comes across Famke Janssens character, she is wearing a red dress. Then all of a sudden she has changed into something more suitable and convenient to jump around in. We never get to see her change. When this happens, she stays in the new outfit for the rest of the movie