Horror Sci-Fi
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)
John Agar
Prof. Clete Ferguson
Grandon Rhodes
Jackson Foster
Robert F. Hoy
Charlie (uncredited)
Don C. Harvey
Mac - Spotlight Party Leader (uncredited)
Brett Halsey
Pete (uncredited)
Nestor Paiva
Captain Lucas
Robert B. Williams
George Johnson
Dave Willock
Lou Gibson
Ricou Browning
The Gill Man (in water) / Lab Technician (uncredited)
Bill Baldwin
Patrol Boat Dispatcher (voice / uncredited)
John Bromfield
Joe Hayes
Lori Nelson
Helen Dobson
Charles Cane
Police Captain
Diane DeLaire
Miss Abbott (uncredited)
Loretta Agar
Woman on Boat (uncredited)
Jere Beery
Photographer (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
Bert Stevens
Search Party Member (uncredited)
Charles Victor
Policeman (uncredited)
Robert Wehling
Joe (uncredited)

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