Pontus
Πόντος
The salt sea, born of Gaia alone.
If Poseidon is the god who rules the sea, Pontus is the sea itself.
Gaia bore him without a mate, and with his mother he then fathered beings of the deep such as Nereus and Ceto.
Half the genealogy of monsters begins here — the Gorgons, Medusa included, belong to this branch.
SourcesHesiod, Theogony