Summary: This children's fantasy tells the story of a 12-year-old boy who discovers a complex underwater world where young children are held prisoner by an evil shark and an eel. (imdb)

Genres: Family/Kids, Fantasy, Adventure, Animation

Country: Poland, UK

Directed By: Lionel Jeffries

Written By: Lionel Jeffries, Charles Kingsley

Starring: James Mason, Billie Whitelaw, David Tomlinson, Joan Greenwood, Bernard Cribbins, Tommy Pender

More information at the Internet Movie Database