Its about a boy who has trouble at his school, and on a certain birthday he gets scales on his hands and it keeps getting worse, find out in the end of the movie his mother is a mermaid and set him on a boat to save him from fishermen. And ideas of the name would be a help:)

The Thirteenth Year (1999) (TV) (http://www.imdb.com/title/tt0200208/)

The Thirteenth Year (1999) (TV) (http://www.imdb.com/title/tt0200208/)

Thank you so much that was the right movie:) if you know anything about my other movie it'd be a great help