Tethys was a golden wreathed, beloved sea deity who bore inside herself all the world's wisdom.

Tethys' husband was the titan of the Seas, Oceanus. From their union sprang out three thousand rivers and three thousand nymphs, the so-called "Oceanids".

Tethys was the titaness who raised the Olympian goddess Hera during the Titans' War with the Olympian gods (also known as Titanomachy).