Sci-Fi Horror
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.
Directed by
Jack Arnold
Clint Eastwood
Jennings (uncredited)
Brett Halsey
Pete (uncredited)
Robert B. Williams
George Johnson
Dave Willock
Lou Gibson
John Agar
Prof. Clete Ferguson
Nestor Paiva
Captain Lucas
Robert F. Hoy
Charlie (uncredited)
Lori Nelson
Helen Dobson
Bill Baldwin
Patrol Boat Dispatcher (voice / uncredited)
Bert Stevens
Search Party Member (uncredited)
Grandon Rhodes
Jackson Foster
John Bromfield
Joe Hayes
Charles Cane
Police Captain
Don C. Harvey
Mac - Spotlight Party Leader (uncredited)
Diane DeLaire
Miss Abbott (uncredited)
Loretta Agar
Woman on Boat (uncredited)
Jere Beery
Photographer (uncredited)
Ricou Browning
The Gill Man (in water) / Lab Technician (uncredited)
Mike Doyle
Cop (uncredited)
Jack Gargan
Skipper (uncredited)
Charles Gibb
Cop (uncredited)
Tom Hennesy
The Gill Man (on land) / Marineland Diver (uncredited)
Don House
Diver (uncredited)
Ned Le Fevre
Newscaster (uncredited)
Sydney Mason
Police Announcer (uncredited)
Patricia Powers
Girl in Convertible
Charles Victor
Policeman (uncredited)
Robert Wehling
Joe (uncredited)
Bob Hoy

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