Directed by
| Lamberto Bava | ... | (as John Old Jr.) |
Writing Credits (in alphabetical order)
| Lamberto Bava | ... | (additional material) |
| Gianfranco Clerici | ... | (screenplay) |
| Luigi Cozzi | ... | (story) (as Lewis Coates) |
| Vincenzo Mannino | ... | (screenplay) (as Frank Walker) |
| Sergio Martino | ... | (story) (as Martin Dolman) |
| Hervé Piccini | ... | (screenplay) |
| Dardano Sacchetti | ... | (screenplay) |
Cast (in credits order)
| Michael Sopkiw | ... | Peter | |
| Valentine Monnier | ... | Dr. Stella Dickens | |
| Gianni Garko | ... | Sheriff Gordon (as John Garko) | |
| William Berger | ... | Prof. Donald West | |
| Iris Peynado | ... | Sandra Hayes | |
 |
Lawrence Morgant | ... | Dr. Davis Barker |
| Cinzia de Ponti | ... | Florinda (as Cinthia Stewart) | |
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Paul Branco | ... | Miller |
| Dagmar Lassander | ... | Sonja West | |
| Rest of cast listed alphabetically: | |||
|
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Ennio Brizzolari | ... | Fisherman (uncredited) |
|
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Dino Conti | ... | Dr. Bob Hogan (uncredited) |
|
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Lisa Frances Rubin | ... | Molly (uncredited) |
| Goffredo Unger | ... | Fisherman That Loses Arm (uncredited) | |
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Darla N. Warner | ... | Dr. Janet Bates (uncredited) |
Produced by
| Mino Loy | ... | producer |
| Max Pécas | ... | co-producer (uncredited) |
Music by
| Fabio Frizzi | ... | (as Antony Barrymore) |
Cinematography by
| Giancarlo Ferrando | ... | (as John McFerrand) |
Editing by
| Roberto Sterbini | ... | (as Bob Wheeler) |
Production Design by
| Massimo Antonello Geleng | ... | (as Anthony Geleng) |
Set Decoration by
| Bill Chappel | ||
| Sam Olsen | ||
Costume Design by
| Massimo Antonello Geleng | ... | (as Antony Geleng) |
Makeup Department
| Giuseppe Ferranti | ... | makeup artist (as Victor Basil) |
Production Management
| Sergio Borelli | ... | production manager (as Boris Gray) |
| Lucia Nolano | ... | unit manager (as Lucy Nolan) |
Second Unit Director or Assistant Director
| Bruno Mattei | ... | assistant director (as Gilbert Roussel) |
| Goffredo Unger | ... | assistant director (as Fredy Unger) |
Sound Department
| Raffaele De Luca | ... | sound (as Ralph Luca) |
| Gene Luotto | ... | post-synchronisation: English version |
Special Effects by
| Germano Natali | ... | special effects |
| Ovidio Taito | ... | creator of the monster shark |
Camera and Electrical Department
| Ennio Brizzolari | ... | key grip |
| Chris Heston | ... | assistant camera |
| Hal Thompson | ... | still photographer |
Editorial Department
| Frazier Gould | ... | assistant editor |
| Phil Lovely | ... | assistant editor |
| Massimo Quaglia | ... | assistant editor (as Max Quayle) |
| Max Quayle | ... | assistant editor |
Script and Continuity Department
| Egle Guarino | ... | script supervisor (as Egle Sun) |
Additional Crew
| Leonardo Curreri | ... | administrator (as Leonard Curren) |
| Larry Dolgin | ... | voice dubbing: Michael Sopkiw - English version |
| Alessandro Loy | ... | production assistant |
| Monique Roussel | ... | production secretary |
| Rosalinda Galli | ... | voice dubbing: Darla N. Warner (uncredited) |
| Dario Penne | ... | voice dubbing (uncredited) |
