Ceto was the Titan goddess of the dangers of the sea and, more specifically, of sea-monsters, whales and large sharks.

Residence: The Sea
Parents: Pontus and Gaia
Siblings: Phorcys, Nereus, Thaumas, Eurybia
Consort: Phorcys
Children: The Gorgons, The Graeae, Ladon and Echidna

Phorkys Mosaic Bardo.jpg
Roman mosaic of Phorcys and Ceto. Bardo Museum.

She was the wife of her brother Phorcys, who together produced a brood of fearsome monsters, such as Echidna, Scylla, the serpent Ladon, the Graeae, and the Gorgons.