Euryale was Medusa’s immortal sister and the Gorgon associated with a far-reaching cry.
Euryale was one of the three daughters of Phorcys and Ceto, together with Stheno and Medusa. Ancient and later descriptions connect her name with the idea of a broad or far-ranging cry, reflecting the frightening vocal power attributed to her.
Like Stheno, Euryale was immortal, while Medusa was mortal. The distinction matters because Perseus’s victory concerned only Medusa; the two immortal Gorgons survived in the traditional story.
Euryale has fewer developed adventures than Medusa. Her name is therefore often overlooked or confused with Stheno, but both names are preserved in ancient genealogies and later mythological reference works. Euryale also appears as a name in other Greek myths, so the context of the Gorgons is important.