In a tributary of the Amazon, a monster – half-man, half-fish – is captured and placed in a reservoir in a Florida national park to be observed by scientists.
Prof. Clete Ferguson
Helen Dobson
Joe Hayes
Captain Lucas
Jackson Foster
Lou Gibson
George Johnson
Police Captain
Woman on Boat (uncredited)
Patrol Boat Dispatcher (voice / uncredited)
Photographer (uncredited)
The Gill Man (in water) / Lab Technician (uncredited)
Miss Abbott (uncredited)
Cop (uncredited)
Jennings (uncredited)
Skipper (uncredited)
Cop (uncredited)
Pete (uncredited)
Mac - Spotlight Party Leader (uncredited)
The Gill Man (on land) / Marineland Diver (uncredited)
Diver (uncredited)
Charlie (uncredited)
Newscaster (uncredited)
Police Announcer (uncredited)
Dr. McCuller (uncredited)
Girl in Convertible
Search Party Member (uncredited)
Policeman (uncredited)
Joe (uncredited)
Man at Tank (uncredited)
Director
Screenplay
Creature Design
Story
Director of Photography
Producer
Art Direction
Art Direction
Set Decoration
Original Music Composer
Original Music Composer
Editor
Set Decoration
Sound
Makeup Artist
Sound Editor
Sound Editor
Sound
Music Supervisor
Music
Hairstylist
Stunts
Music
Assistant Director
Music
Unit Production Manager
Music
Stunts
Stunts
Stunts
Costume Designer
Musician