How many prongs should be on a dinner fork? Don't ask the Disney animators who worked on "The Little Mermaid," because they couldn't seem to make up their minds: In the scene where Ariel discovers the fork in the sunken ship, the fork has three prongs in distant shots, but four prongs in the closeups. The same thing happens later on in the movie, when Ariel, Prince Eric and Grimsby are sitting at the dinner table.