In Greek mythology and, later, Roman mythology, the Oceanids or Oceanides (/oʊˈsiːənɪdz, ˈoʊʃənɪdz/; Ancient Greek: Ὠκεανίδες, pl. of Ὠκεανίς) are sea nymphs who were the three thousand daughters of the Titans Oceanus and Tethys. Each was the patroness of a particular spring, river, sea, lake, pond, pasture, flower or cloud. Some of them, such as Clymene, Asia, and Electra, were closely associated with the Titan gods or personified abstract concepts (Tyche, Peitho).
One of these many daughters was also said to have been the consort of the god Poseidon, typically named as Amphitrite. More often, however, she is called a Nereid.
Oceanus and Tethys also had 3,000 sons, the river-gods Potamoi (Ποταμοί, "rivers").
Notable Oceanids include:
Sailors routinely honoured and entreated the Oceanids, dedicating prayers, libations and sacrifices to them. Appeals to them were made to protect seafarers from storms and other nautical hazards. Before they began their legendary voyage to Colchis in search of the Golden Fleece, the Argonauts made an offering of flour, honey and sea to the ocean deities, sacrificed bulls to them and entreated their protection from the dangers of their journey.