Keto was a primordial deity of the sea in Greek mythology, the daughter of the Titans Pontus and Gaea, and personification of all the dangers that the sea posed. Her spouse was Phorcys, with whom she had a number of children that were all monsters, known as Phorcydes. The Phorcydes included Echidna, the Gorgons (the three sisters Euryale, Stheno and Medusa), the Graeae, and Ladon. Sometimes, the monster Scylla was also considered a child of Keto.
Keto Is also called Ceto, Crataeis, Trienus.