In this lushly animated undersea adventure, three children stumble upon the hidden cave of mad professor MacKrill and drink a potion that transforms them into sea creatures. The chase is on when the antidote falls into the hands (or fins!) of lowly pilot fish Joe, who drinks it and acquires the power of speech and a tyrannical desire for world control. Featuring the voices of Monty Python’s Terry Jones and Alan Rickman (Snape in the Harry Potter films). Animation.

Recommended ages: 4 to 10.