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.
- Genre: Adventure, Horror, Science Fiction
- Studio: Universal International Pictures
- Keyword: monster, boat, paleontology, expedition, chase, ship, amazon, water monster, black and white, creature, scientist, sea monster, lagoon, amazon rainforest, fossil, spear gun
- Cast: Richard Carlson, Julie Adams, Richard Denning, Antonio Moreno, Nestor Paiva, Whit Bissell