Strawberry's friend Coco Calypso lives on Seaberry Beach with her pet, Papaya Parrot, and a band of fun-loving monkeys. When the seaberries that Coco harvests from the sea are stolen, she asks Strawberry, Rainbow Sherbet and Blueberry Muffin to solve the mystery.

A fantasy episode in which Strawberry, Rainbow Sherbet, Blueberry Muffin, Coco Calypso, and Seaberry Delight imagine themselves as Mermaids, drawn into a grand adventure. Hearing about a fabled treasure of golden sand-dollars, they set out to find it.