In Greek mythology, the Titan Oceanus and his sister-consort Tethys were the parents of the 3,000 Oceanids, most significantly Clymene and Metis. The Oceanids were ocean nymphs and sisters to the Potamoi, minor gods of rivers and streams and fathers of the Naiads.
About 100 of the Oceanids are important enough to name. Perhaps the most significant is Clymene, wife of the Titan Iapetus and the mother of Prometheus and Atlas in some genealogies. Another Oceanid, Metis, was Zeus' first wife and mother of Athena. Though the myth famously describes Athena springing from Zeus' head, she was born and raised by Metis while inside Zeus.