A field trip to the aquarium? Being surrounded by fish is CatKid's dream — and she's terribly disappointed to learn that you don't actually go fishing at an aquarium. But CatKid soon discovers there's so much to see — dolphins, jellyfish, starfish, and more! The teacher announces a prize will be given to the winner of an "underwater" treasure hunt. With her best friend Maddie's help, our favorite half-feline will find a way to win that prize — and prove that no one has a nose for fish quite like CatKid.