In Ancient Greek mytholoy Ceto is the name of a sea monster;often represented as a whale, or a large fish. She is the daughter of Pontos and Gaia. Together with her brother Phorcys she bore the Gorgons, and Graeae, Echidna and Ladon.
- "κῆτος" in Liddell, Henry and Robert Scott. 1996. A Greek-English Lexicon. Revised by H.S. Jones and R. McKenzie. Ninth edition, with revised supplement. Oxford: Clarendon Press.