Synopsis
When scientists exploring the Amazon River stumble on a “missing link” connecting humans and fish, they plan to capture it for later study. But the Creature has plans of his own, and has set his sights on the lead scientist's beautiful fiancée, Kay.
Cast

Richard Carlson
Dr. David Reed

Julie Adams
Kay Lawrence

Richard Denning
Dr. Mark Williams

Antonio Moreno
Dr. Carl Maia

Nestor Paiva
Captain Lucas

Whit Bissell
Dr. Edwin Thompson

Bernie Gozier
Zee
Henry A. Escalante
Chico

Ricou Browning
The Gill Man In Water (uncredited)

Art Gilmore
Narrator (voice) (uncredited)

Perry Lopez
Tomas (uncredited)
Sydney Mason
Dr. Matos (uncredited)

Rodd Redwing
Luis (uncredited)
James Miller
Old Man (uncredited)

Ben Chapman
The Gill Man On Land (uncredited)
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