Sandy Ricks is sent by his mom to Coral Key, a rustic island in the Florida keys, to spend the summer with his uncle Porter Ricks. Sandy dislikes everything about his new environment until a new friend comes into his life, a dolphin named Flipper, that brings uncle and nephew together and leads Sandy on the summer adventure of a lifetime.
Sandy is distraught when, having saved Flipper by pulling out a spear, his father insists the dolphin be released. A grateful Flipper, however, returns the favor when Sandy is threatened by sharks.
A biological experiment in Florida goes awry. The result: 8-foot long land crabs which roar loudly and kill everything in sight.
