Hydra is a nine-headed sea serpent who guards the entrance to the Underworld from Earth. Learn more about her and other Greek gods, goddesses, and creatures with our Picture Encyclopedia!
Hydra is a nine-headed sea serpent who guards the entrance to the Underworld from Earth, called Lerna. Her breath, blood, and saliva are poisonous, and her heads regenerate when they are severed.
Storyboard Text
HYDRA Hydra is a nine-headed sea serpent who guards the entrance to the Underworld from earth, called Lerna. Her breath, blood, and saliva are poisonous, and her heads will regenerate when they are severed.