Shark Tale has stormed to the top of the UK and Ireland box office taking £7.5m in its opening first three days.
The animated cartoon tells the story of a fish called Oscar who has big dreams of escaping his dull life and becoming a famous fish.
Characters are voiced by big name movie stars including Will Smith, Angelina Jolie and Robert De Niro.
The underwater movie has been described as a cross between Finding Nemo and an Italian gangster film.