Three female monsters with hair of snakes and dragonbodies. If you looked at them, you would be turned to stone. Stheno and Euryale were immortal but Medusa was mortal. She was eventually killed by the hero Perseus, and from her blood the winged horse Pegasus was born whom she had with Poseidon.Their parents were the sea god Phorcys and Ceto and they lived in the western ocean. The head of the Gorgon was often used in Art. It was pictured on the aegis of Athena, people would have it as door knockers to protect the house from evil and it was also painted or sculputerd inside cups.