In the comics, Morris Bench was a crewman aboard a cargo ship which tested experimental generators in the Ocean. When Spider-Man attempted to stop the crew, Morris was accidentally knocked into the water by the web-slinger as the generator was running.
The result transformed Morris into a man made of water and gave him the superpowers of water mimicry. As the Hydro-Man, Morris worked to declare vengeance on Spiderman and often attempted to kidnap Mary Jane Watson to try to make her his lover.
Marvel Cinematic Universe
Hydro Man was an illusion created and controlled by Quentin Beck, representing the Elemental of water.