As told to a psychiatrist: Mr. Peabody, a middle-aged Bostonian on vacation with his wife in the Caribbean, hears mysterious, wordless singing on an uninhabited rock in the bay. Fishing in the vicinity, he catches...a mermaid. He takes her home and, though she has no spoken language, falls in love with her. Of course, his wife won't believe that the thing in the bathtub is anything but a large fish.
| Directing | Irving Pichel | Director |
| Writing | Nunnally Johnson | Screenplay |
| Writing | Guy Jones | Novel |
| Production | Nunnally Johnson | Producer |
| Art | Ruby R. Levitt | Set Decoration |
| Costume & Make-Up | Grace Houston | Costume Design |
| Art | Boris Leven | Art Direction |
| Costume & Make-Up | Carmen Dirigo | Hairstylist |
| Art | Russell A. Gausman | Set Decoration |
| Costume & Make-Up | Bud Westmore | Makeup Artist |
| Editing | Marjorie Fowler | Editor |
| Art | Bernard Herzbrun | Art Direction |
| Directing | Fred Frank | Assistant Director |
| Camera | Russell Metty | Director of Photography |
| Sound | Robert Emmett Dolan | Original Music Composer |
| Directing | Julia Marcia Davies | Script Supervisor |
| Camera | Maurice Goldberg | Still Photographer |
| Camera | Philip H. Lathrop | Camera Operator |
