Florida aquarium workers (John Agar, Lori Nelson, John Bromfield) communicate by cattle prod with a captured gill-man.
| Director: | Jack Arnold |
| Producer(s): | William Alland |
| Cast: | Clint Eastwood, Dave Willock, Lori Nelson, John Agar, Robert Williams, John Bromfield, Nestor Paiva, Ricou Browning, Charles Cane, Grandon Rhodes |
| Writer(s): | Martin Berkeley |