Neptune: Roman God of the Sea - Mythology Explained

After Gigantomachy, the Great War with the giants, Neptune’s brother Jupiter had overthrown their father Saturn as ruler and the three brother gods, Jupiter, Neptune and Pluto were charged with ruling the worlds. Jupiter took the sky, Neptune became ruler of the sea and Pluto’s domain was the underworld. Eventually, Jupiter became the supreme god who ruled all of the Earth and sky, while Neptune married Salacia and stayed in the sea, and Pluto went to the underworld where he presided over the afterlife.