Flipper

Dr. Bill Darmon is attacked by a shark while skin-diving off Coral Key Park and Marine Preserve. Struggling back aboard his boat, he radios to Porter Ricks to bring a rare blood type that can save his life.

Porter Ricks has dumped a number of junked cars into the ocean around Coral Key Marine Preserve to provide a haven for fish in the area.

Porter Ricks is forced to close the Coral Key Park and Marine Preserve when deadly scorpion fish are discovered in the area.

Beautiful Kathryn Terrence visits Porter Ricks just in time to spoil his plans for a water polo game with Sandy, Bud and Flipper and Bud is convinced that she is trying to trick his father into marrying her.

City boy, Mike Beldon, comes to visit the Ricks’ household in Coral Key Park and creates trouble by his lack of concern for water safety. Finally, against Sandy’s better judgment, Mike convinces Sandy to go skin-diving into a sunken ship. The boys become trapped below decks with very little air in their tanks. Only when Flipper returns to shore to sound the alarm is there hope that Porter Ricks and Mike’s father can save the boys.

An unscrupulous local fisherman, Dorrie Stone, accidentally observes how Sandy and Bud Ricks are able to summon Flipper by sounding their ancient auto horn.