Continuity mistake: When King Triton destroys the stone statue of Prince Eric, you can see that the statue's face explodes and breaks into pieces as well as the rest of the body. However, at the point a few minutes later when Ariel decides to meet the sea witch Ursula, she caresses the statue's face as a whole again. (00:35:30)
Continuity mistake: At the start, when King Triton makes his appearance he's holding dolphin reins, and at first it's shown as two separate straps in Triton's hand as he tells Sebastian he's looking forward to the performance, but when Sebastian replies that it will be the finest concert he's ever conducted, Triton lets go of the rein and it's a single continuous strap. (00:04:15)
Continuity mistake: While Louis is preparing the stuffed crab and then while he tries to kill Sebastian, the gold buckles on the chef's shoes appear, disappear, and reappear randomly. It happens again at the end, when Louis goes after Sebastian on the ship the gold buckles suddenly appear on the chef's shoes after his teeth are knocked out. (00:52:15)
Continuity mistake: After Carlotta walks out of the kitchen with the dome covered dinner plates, when it cuts to the others in the dining room Grimsby has a plate in front of him, but in the next shot that plate has vanished just as Carlotta is about to place the dome covered plate in front of him. (00:54:45)
Continuity mistake: When Grimsby is presenting the statue of Eric to the prince, one of the crew's shirts changes colour from white/dark blue stripes to light blue/dark blue stripes, within the same shot. (This can be seen in the "Limited Issue" DVD, but was corrected in the DVDs issued in 2006). (00:20:00)
Continuity mistake: After Sebastian knocks over the bowl onto the chef's head, when Louis goes after Sebastian with the cleaver the style of the handle and the blade changes when Louis lifts the cleaver over his head and then chops the table. It happens again when the cleaver blade is rammed into the floor in front Sebastian, and in the next shot as Sebastian turns around the cleaver style has changed again. (00:54:10)
Continuity mistake: When Sebastian is hiding from the chef under a lettuce leaf in the kitchen, at first he is behind a bunch of stuff on the table. In the next shot, all the stuff is gone, and he's alone on the table.