A young girl is killed at the beach in Malibu. Professor Otto Lindsay suspects that it is some form of mutated fish. However, his son Richard, who was a good friend of the girl, thinks that it is a madman who has a grudge against Richard and his friends. Soon the list of victims grows.
Unfortunately the movie The Beach Girls and the Monster is not yet available on HBO Max.
| Directing | Jon Hall | Director |
| Writing | Joan Gardner | Story |
| Writing | Joan Gardner | Screenplay |
| Sound | Frank Sinatra Jr. | Original Music Composer |
| Crew | Robert Hansard | Special Effects |
| Costume & Make-Up | Joann Howard | Makeup Artist |
| Production | Ed Janis | Producer |
| Sound | Emery Cohen | Sound |
| Production | Henry Rose | Production Manager |
| Editing | Dolph Rudeen | Supervising Editor |
| Editing | Radley Metzger | Editor |
| Costume & Make-Up | Adelade Halpern | Hairstylist |
| Camera | Jon Hall | Director of Photography |
| Art | Shirley Rose | Art Direction |
