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All New Thrills! Shocks! Suspense!
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.
Jack Arnold
William Alland
$1,100,000
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)
