AllMovie

A film crew arrives in Coral Key to shoot the underwater scenes for a horror movie. But the real monster turns out to be more of the green-eyed variety, when young Bud Ricks (Tommy Norden) becomes jealous -- the film cast includes a pretty young actress (Wende Wagner), who not only manages to infatuate Bud's older brother Sandy (Luke Halpin) but also Flipper, which leaves the boy feeling left out and very resentful. Between Bud's unhappiness, and the recklessness of the director (Jack Carr), a near-disaster takes place underwater, with potentially tragic consequences for the dolphin and several members of the film crew, including the "monster" (Ricou Browning).