Hydros, Jr., or Hidros, Jr., (known in Roman mythology as Natrix, Jr.) is the son of Hydros, Sr. the Primeval God of Water and one of the five fictional Titans that Hades sets free in the film Hercules. His back is slightly hunched and he is made entirely of ice. While being made of ice, he can freeze things by touching them with any part of his body.

Hydros is defeated when Hercules uses Stratos to suck up Hydros and the other two Titans and then flings him and the other three into outer space.

His name could be refering to the greek word "hydros", which means "water serpent".