Cetus

Origin and tradition

Greek mythology uses Cetus for monstrous sea beasts, including the creature sent against Andromeda.

Illustration in this atlas

A whale-serpent-dragon of jagged fins, crushing jaws, and surf exploding around its back.

References and further reading

1. en.wikipedia.org — Cetus (mythology)

These references offer further reading. Accounts and depictions vary; the atlas illustration is interpretive artwork, rather than historical or scientific evidence.