Directed by
| Roger Corman | ... | (directed by) |
Writing Credits
| Charles B. Griffith | ... | (screenplay by) (as Charles Griffith) |
Cast (in credits order) complete, awaiting verification
| Richard Garland | ... | Dale Brewer | |
| Pamela Duncan | ... | Martha Hunter | |
| Russell Johnson | ... | Hank Chapman | |
| Leslie Bradley | ... | Dr. Karl Weigand | |
| Mel Welles | ... | Jules Deveroux | |
| Richard H. Cutting | ... | Dr. James Carson (as Richard Cutting) | |
| Beach Dickerson | ... | Seaman Ron Fellows (as Beech Dickerson) | |
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Tony Miller | ... | Seaman Jack Sommers |
| Ed Nelson | ... | Lt. Quinlan | |
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Robin Riley | ... | Seaman |
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Doug Roberts | ... | Seaman |
| Rest of cast listed alphabetically: | |||
| Charles B. Griffith | ... | Seaman Tate (uncredited) | |
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Maitland Stuart | ... | Seaman Mac (uncredited) |
Produced by
| Roger Corman | ... | producer (produced by) |
| Charles B. Griffith | ... | associate producer |
Music by
| Ronald Stein | ... | (music by) |
Cinematography by
| Floyd Crosby | ... | (photographer) |
Editing by
| Charles Gross Jr. | ... | film editor |
Makeup Department
| Curly Batson | ... | makeup artist (as Curley Batson) |
Second Unit Director or Assistant Director
| Maurice Vaccarino | ... | assistant director |
| Charles B. Griffith | ... | director underwater scenes (uncredited) |
| Lindsley Parsons Jr. | ... | second assistant director (uncredited) |
Art Department
| Karl Brainard | ... | props (uncredited) |
Special Effects by
| Beach Dickerson | ... | crab monster operator (uncredited) |
| Ed Nelson | ... | special effects (uncredited) |
Camera and Electrical Department
| Charles Hannawalt | ... | chief grip (uncredited) |
| Floyd Williams | ... | gaffer (uncredited) |
Costume and Wardrobe Department
| Marjorie Corso | ... | wardrobe (uncredited) |
Additional Crew
| Maitland Stuart | ... | underwater technician |
| Paul Julian | ... | title designer (uncredited) |