Continuity: When Sebastian is in Ariel's cavern with all her treasures, he accidentally gets his legs caught in a thimble. You can see it from the front, but when they show a shot from the back, it is gone.  In the following shot from the front, it is back on again. (Time)

Continuity: When Grimsby is presenting the statue of Eric to the prince, one of the crew's shirts changes colour from white/black stripes to blue/black stripes. (Time)

Continuity: When Ariel is in the Prince's guest bedroom, the covers suddenly appear over her. (Time)

Continuity: During the "Kiss the Girl" song a bunch of fish swim up underneath the boat, and the water is seen to be very deep. After the boat is knocked over however, Ariel and Eric are standing in the water which now appears to be only a few feet deep.

Continuity: When Ariel and Eric are in the boat together before their attempt to kiss, Ariel's hair is down. But in their shadows on the water, her hair is in a ponytail.