Medusa is one of the three Gorgons (horrible female creature) along with her sisters Euryale and Stheno in Greek mythology and is the only one to be mortal. Her hair is intertwined with serpents...

In Greek mythology, a gigantic snake that had several heads (the number varies) or multi headed serpent, and breathed poisonous breath through its mouths on the marshes of Lerna, near Argos. ...