Ariel and her sister: The Little Mermaid?

Question

If Ariel had so many sisters (as shown in Ariel's beginning):

What happened to all of them in The Little Mermaid I and II. It seemed to me like she was an only child.

Answer 1

why do you care lmao... its a good movie thats all that counts no one knows the answer to that only the person who made the movie

Answer 2

I'm not sure if the sisters where shown in the second movie, but they showed them in the beginning of the first movie, during the concert Ariel was supposed to be in, and at the end of the movie, when Ariel got married. They where in the water by their father.