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