Gorgons

According to the supplied classical summary, the Gorgons are three related monstrous sisters—Stheno, Euryale, and Medusa—born to the sea-ancestral pair Phorcys and Ceto. They are placed in the mythic landscape as neighbors of the Graeae (another set of mythic sisters) and function within heroic-age narratives as dangerous beings who confront heroes; in the best-known narrative represented here, Medusa is slain by the hero Perseus while her sisters remain immortal.

The provided sources describe the Gorgons succinctly as 'three monstrous sisters'—Stheno, Euryale, and Medusa—without elaborating detailed physical features in the supplied excerpts. That description situates them as visibly fearsome mythic figures in classical accounts, while the present notes caution that fuller iconographic or literary descriptions exist elsewhere but are not included in the supplied material.

In the supplied material the chief attested power of the Gorgons is a transformatory visual effect: they 'were able to turn anyone who looked at them to stone.' The sources also distinguish their ontological statuses: Euryale and Stheno are described as immortal, whereas Medusa is mortal and is killed by Perseus — a narrative outcome that demonstrates that, within the mythic tradition cited here, at least one sister could be opposed and slain.