FROM THE AMAZON’S FORBIDDEN DEPTHS CAME THE CREATURE FROM THE BLACK LAGOON
A scientific expedition searching for fossils along the Amazon River discover a prehistoric Gill-Man in the legendary Black Lagoon. The explorers capture the mysterious creature, but it breaks free. The Gill-Man returns to kidnap the lovely Kay, fiancée of one of the expedition members, with whom it has fallen in love.
So The Shape of Water is a sequel of this movie?
I mean… basically!