Help! I'm a Fish is a feature length animation of the highest standard in which we meet the characters of Fly, Chuck and little Stella. While on a fishing trip, the three friends bump into Professor MacKrill who is clearly mad as a box of frogs. As nutty as he may be, he does have a magic potion that turns humans into fish! A potion that Little Stella accidently takes without Fly or Chuck knowing. When they eventually realise it she is already under the sea - lost. Naturally the only solution is for Fly and Chuck to take the potion and find her. Soon all three meet up in the depths of the ocean and discover a magical underwater world of both good and evil talking fish.