"Puffer Fish wakes up one morning to find that his pirate underwear has been taken from the clothesline! So Octopants the octopus offers to help look for them. They check Lobster's Laundry, look through Mermaid's hair, and even stop by Mussel's Fitness Club, but the underwear isn't anywhere...Then Shark appears and wants to join the group. But what's that on her head?"-- Provided by publisher.