"When a silly prank lands Squizzard in deep trouble, he comes down with a case of the barnacle blues. Instead of going to the Coral Carnival with his friends, he'll have to do the swim-possible and turn Seaweed Elementary's junk-filled basement into an activity room for after-school clubs. But there just may be hidden treasures to discover if Squizzard can stop all the funny business long enough to find them."--