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In Greek mythology, Thalassa (//; Greek: Θάλασσα, "Sea") is a primordial sea goddess, daughter of Aether and Hemera. With sea god Pontus, she was the mother of the nine Telchines and Halia. According to a myth recounted by Hesiod, she gave birth to Aphrodite when Cronus cut the genitalia of Uranus that subsequently fell into the sea. Thalassa is a personification of the sea itself; as told in Aesop's Fables she appears as a woman rising up from the depths of the sea, as well in Roman-era mosaics. In these mosaics she is depicted with crab-claw-horns, wearing seaweed, and holding a ship's oar. Her counterpart is considered to be Amphitrite who is the wife of Poseidon. Her other counterpart can be considered to be the Greek titan Tethys.
In 2011, Swoon created a site-specific installation depicting the goddess in the atrium of the New Orleans Museum of Art.