|Parents||Phorcys and Ceto|
|Siblings||Stheno, Medusa, the Graeae, Thoosa, the Hesperides, Echidna, and Ladon|
Euryale and her sisters were daughters of primordial sea god and goddess Phorcys and Ceto, who personified the dangers of the sea. According to Hyginus, the parents of the Gorgons were Gorgon and Ceto. In some variations of the myth of Orion, she is the hunter's mother by Poseidon, who lay with her following Medusa's death.
Euryale and her sister Stheno were immortal, whereas Medusa was mortal. Euryale, like Stheno and Medusa, also had the ability to turn anyone to stone with her gaze. In many stories, Euryale is noted for her bellowing cries, particularly in the tale of Medusa's death at Perseus' hands, in which her anguished howls could make stone crumble to sand.