|Parents||Phorcys and Ceto or Typhon and Echidna|
|Siblings||The Hesperides, Euryale, Medusa, Graeae, Thoosa, Scylla, and Ladon or Cerberus, Hydra, Chimera, and many more monsters|
The daughter of Phorcys and Ceto, Stheno was born in the caverns beneath Mount Olympus. She and her sister Euryale were both immortal, but the third sister, Medusa, was not immortal, she was mortal.
Of the three Gorgons, she was known to be the most independent and ferocious, having killed more men than both of her sisters combined. In Roman mythology, she was transformed into a Gorgon for her relationship to her sister Medusa, a priestess of Minerva, who had a sexual encounter with the sea god Neptune (mythology) in her goddess's temple. Furious with Medusa for this act of desecration, Minerva changed her into a terrible monster, along with her sisters Stheno and Euryale. Stheno tends to be depicted as a thin gorgon monster with red snakes curling around her head instead of hair. Earlier accounts, however, describe her as having a scaly head, a boar's tusks, bronzed hands, a protruding tongue, glaring eyes and a snake around the waist as a belt.
- Wilk, Stephen R. "Mythological Evidence for Ancient Observations of Variable Stars." Journal of the American Association of Variable Star Observers 24 (1996): 129-133.
- Wilk, Stephen R. Medusa: Solving the mystery of the Gorgon. Oxford University Press, 2000.