Here are some fun facts about the little mermaid movie:
In the lunch scene with Ariel, Eric, and Grimsby, Sebastian crawls from Grim's plate to Ariel's, and the table is clean. At the end of the scene, little white footprints appear.
When Ariel first enters her grotto she closes the door behind her, but when she swims out the door is already open.
When Ariel is eating with Grim and Eric, her fork changes back and forth from three prongs to four prongs.
When Ariel's voice is freed from the conch shell and floats over to her, she is barefoot. In the next full shot of her, she is wearing shoes.
When Ariel sits down at the table and takes a fork, her nails are covered with pink varnish. Later no varnish is seen.
While Ariel is singing "Part of your world" on the rock, the sea is rough and choppy. But when you cut to the shot from behind the sea is perfectly calm.