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.

Cast:John Agar, Lori Nelson, John Bromfield, Nestor Paiva, Grandon Rhodes, Dave Willock,

Genre:Science Fiction, Adventure, Horror,

country:United States of America,

Production:Universal Pictures, Universal International Pictures,