“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.
Director
Writers
Martin Berkeley, William Alland
Revenue
$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)