What is "thaumas"

In Greek mythology, Thaumas (; Θαύμας; gen.: Θαύμαντος; folk etymology "wonder") was a sea god, son of Pontus and Gaia. He married Electra, one of the Oceanids, the three thousand daughters of the Titans Oceanus and Tethys. The children of Thaumas and Electra were the Harpies (According to Hyginus, Fabulae 14, the Harpies were the daughters of Thaumas and Ozomene) and Iris, the goddess of the rainbow and a messenger of the gods, especially of Hera; according to some accounts, also her fraternal twin sister Arke.

Poseidon overthrew him and became the new sea god.

Thaumas was also the name of a centaur.