In Greek mythology, Thalassa was the personification of the sea. She was the offspring of Aether and Hemera. By Pontus, Thalassa gave birth to nine sea-demons, the Telchines, who had the heads of dogs and flippers for hands (But it wasn't that bad, they could shape-shift).

Thalassa is sometimes sed to have mothered Aphrodite by Zeus.


Thalassa is also the name of the irregularly shaped second moon of Neptune, discovered by Voyager 2 in 1989.

Equatorial radius .............. 40 km
Diameter ....................... 80 km
Mean distance from Neptune ..... 50,000 km
Orbital period ................. 0.311485 days
Mean orbital velocity .......... 11.68 km/sec
Orbital inclination ............ 0.21 degrees
Orbital eccentricity ........... 0.0002
Visual geometric albedo ........ 0.06
Visual magnitude from earth .... 23.8

Mass, mean density, and rotational period are unknown.

The moons of Neptune are: Naiad, Thalassa, Despina, Galatea, Larissa, Proteus, Triton, and Nereid.