She didn't exactly have powers, she was simply an embodiment of the waters of the world, the mother of the chief rivers known to the Greeks (Nile, Maeander, ...) and the mother of the approximately three thousand Oceanids.
Tethys was the daughter of Gaia and Ouranos.
Tethys is one of the moons of Saturn
Daimio tethys was created in 1857.
Yes; Metis was the daughter of Tethys and Oceanus.
Tethys did not have a Roman name, as she was a Greek goddess.
Tethys Research Institute was created in 1986.
Yes Tethys the daughter of Gaia and Ouranos was immortal, and the wife of Okeanos.
Metis (moon of Jupiter) was a daughter of Tethys and Oceanus.
Tethys
tethys
The Titan Oceanus