Three kids are accidentally sent on the underwater adventure of a lifetime in this animated story for the whole family. Five-year-old Stella and her 13-year-old brother Fly are dropped off to spend the afternoon with their Aunt Anna and her son, an overweight computer geek named Chuck. Fry, Stella, and Chuck soon tire of Aunt Anna, and they sneak out to go fishing. When the tide suddenly comes in, the kids have trouble finding their way home, and they end up in the lab of a benignly mad scientist who is convinced global warming will soon cause the polar ice caps to melt. With this in mind, the scientist has come up with a formula that will turn people into fish so that they will be able to survive in the new, waterlogged environment. Stella accidentally samples the special potion, and is turned into a fish and accidentally released into the ocean. Realizing what's happened, Fly and Chuck also sample the formula, and hit the waters with the antidote in tow to save Stella. However, as they look for their newly fishy relative, Fly and Chuck encounter Joe, a mean-spirited fish with delusions of grandeur. When Joe gets a taste of the antidote to the fish transformation serum, he gains the accelerated logic and intelligence of a human being, and begins hatching a plan by which he will take control of the oceans -- and then the world. Gloups! Je Suis Un Poisson was produced by a Danish creative team, and animated by talent from Denmark and Germany; the film's original Danish title was Haelp, Jeg Er En Fisk, while the film was screened in Europe in versions dubbed into French or German. An English language edition was prepared, with Alan Rickman and Terry Jones highlighting the voice cast.
~ Mark Deming, All Movie Guide