In Greek mythology, King Polydectes was the ruler of the island of Seriphos, son of either Magnes and an unnamed Naiad, or of Peristhenes and Androthoe, or of Poseidon and Cerebia. His story is largely a part of the myth of Perseus, and runs as follows according to the Bibliotheca and John Tzetzes.

In Greek mythology, King Polydectes was the ruler of the island of Seriphos, son of either Magnes and an unnamed Naiad, or of Peristhenes and Androthoe, or of Poseidon and Cerebia. His story is largely a part of the myth of Perseus, and runs as follows according to the Bibliotheca and John Tzetzes.