Greek sea gods conform to a single type: that of Homer's "halios geron" or Old Man of the Sea: Nereus, Proteus, Glaucus and Phorkys. These sea gods are not as powerful as Poseidon, the main god of the oceans and seas. Each one is a shape-shifter, a prophet, and the father of either radiantly beautiful nymphs or hideous monsters (or both, in the case of Phorkys). Nymphs and monsters blur, for Hesiod relates that Phorcys was wed to the "beautiful-cheeked" Ceto, whose name is merely the feminine of the monstrous Cetus, to whom Andromeda was due to be sacrificed. Each appearance in myth
The God Beneath the Sea and more violent with age. Thetis and Eurynome give him a hammer, anvil and forge to vent his fury and discover he is a gifted smith. Hephaestus' most beautiful creation is a brooch depicting a sea nymph and her lover; he threatens to destroy the brooch unless Thetis tells him who he is and how he came to live in the grotto. The goddesses resume their tales: Rhea and Zeus conspire to overthrow Cronus. The avenging children of Cronus defeat and imprison the Titans, sparing Rhea, Prometheus and Epimetheus. The gods fashion their home on Olympus, and Zeus seduces Hera