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On returning to Seriphos and discovering that his mother had to take refuge from the violent advances of Polydectes, Perseus killed him with Medusa's head, and made his brother Dictys, consort of Danaë, king.
Also asked, who was sacrificed to the Kraken?
When Perseus severed her head, two winged horses flew from her neck, Pegasus, and Chrysaor. Flying on Pegasus, he saw below the beautiful princess Andromeda chained to a rock, about to be sacrificed to Cetus, a sea monster also known as The Kraken.
Also question is, who killed the Kraken in Clash of the Titans?
Perseus
Medusa was beheaded by the hero Perseus, who thereafter used her head, which retained its ability to turn onlookers to stone, as a weapon until he gave it to the goddess Athena to place on her shield.