Ponyo - "The Little Mermaid" Reincarnated
In Ponyo, "a young boy named Sosuke rescues a goldfish named Ponyo, and they embark on a fantastic journey of friendship before Ponyo's father forces her to return to the sea. Ponyo's desire to be human upsets the balance of nature and only Ponyo's mother, a beautiful sea goddess, can restore nature's balance and make Ponyo's dreams come true."
With a famous English voice cast, including stars such as Cate Blanchett, Matt Damon, Tina Fey, Liam Neeson, Cloris Leachman, and Lily Tomlin, Ponyo is entertaining and intriguing, though it may be a little slow or long for younger children.
There is also a bit of an environmental theme in the movie, influencing the audience to help keep the oceans clean.
Oddly enough, there are diverse other reworkings of "The Little Mermaid." These include a teen fiction novel, Midnight Pearls, in Debbie Viguié's Once Upon a Time series; an adult fantasy novel entitled The Mermaid's Madness by Jim C. Hines; and of course, the most well-known, the Disney film adaptation of the story.