Oceanids

The Oceanids were daughters of Oceanus and Tethys. There were three thousand daughters of the Titans. Oceanus also has equal number of sons, who were all river gods.

Though being an Oceanid, doesn't necessary mean that she was water deity. The Oceanids, unlike the Nereïds, had no special functions or roles. Some are both nymph and goddess. Only some of Oceanus' daughters have attributes of the water goddess, such as the sea or river.

The eldest daughter being Styx, and she was the only female river deity, in a world full of river gods. Others such as Doris and Amphitrite were clearly represented as goddesses of the sea. But figures, such as Metis, who was the goddess of wisdom, seemed to have no connection with water.

In the Theogony, Hesiod described them as the holy company, who with their brothers (river-gods) and Apollo, kept watch over the youths. Since there were 3000 daughters of Oceanus, they were dispersed far and wide, living in all part of the world; in the sea or on land.

Only a few other well-known Oceanids were goddesses in their own right. There was the Oceanids Doris and Amphitrite (possibly a Nereid), both being goddesses of the sea; and Metis was the goddess of intelligence and cunning.

The rest were more like nymphs than actual goddesses, such as Pleïone, mother of the Pleiades; and Clymene or Asia, mother of Prometheus.

Some of the Oceanids were seduced by the gods or married to mortals, bearing sons who were heroes or princes.

Here, are the list of names found in Hesiod' Theogony:

Peitho, Admete, Ianthe, Electra, Doris, Prymno, Urania, Hippo, Clymene, Rhodea, Callirrhoë, Zeuxo, Clytie, Idyia, Pasothoë, Plexaura, Galaxaura, Dione, Melobosis, Thoë, Polydora, Cerceïs, Pluto, Perseïs, Ianeira, Acaste, Xanthe, Petraea, Menestho, Europa, Metis, Eurynome, Telesto, Chryseis, Asia, Calypso, Eudora, Tyche, Amphirho, Ocyrrhoë, Styx.

http://www.timelessmyths.com/classical/nymphs.html#Oceanids