Ponyo

Gake no ue no Ponyo is a movie starring Cate Blanchett, Matt Damon, and Liam Neeson. A five-year-old boy develops a relationship with Ponyo, a young goldfish princess who longs to become a human after falling in love with him.
When Sosuke, a young boy who lives on a clifftop overlooking the sea, rescues a stranded goldfish named Ponyo, he discovers more than he bargained for. Ponyo is a curious, energetic young creature who yearns to be human, but even as she causes chaos around the house, her father, a powerful sorcerer, schemes to return Ponyo to the sea.