Amykos

Within the Greek mythic framework, Amykos is presented as a local king of the Bebryces in Bithynia. He is named in the sources as a son of the sea-god Poseidon and the Bithynian nymph Melia, which places him among semi-divine offspring in Greek genealogy. His chief narrative role is an episodic antagonist: when the Argonauts passed through Bithynia he compelled strangers to box and was eventually challenged and killed by Polydeuces (one of the Argonauts). The episode also functions etiologically in antiquity, as a bay at modern Beykoz was called Amykos.

Surviving textual summaries describe Amykos as a "doughty man," implying a robust, martial kingly figure; no consistent detailed physical portrait is supplied in the cited sources. The episode was represented in Greek visual art — vase-painters (including the eponymous Amykos Painter) depicted the punishment of Amykos — but the iconography in the provided material does not establish a standardized visual type beyond his portrayal as a strong, combative figure.

Amykos is characterized chiefly by violent behavior rather than explicit supernatural powers in the cited sources: as a king he compelled visiting strangers to engage in boxing matches, using the contests as a means to kill them. His parentage by Poseidon implies exceptional physical prowess and explains his role as a formidable opponent in narrative logic, but the sources do not list miraculous abilities. He is defeated and killed during the Argonauts' episode by their champion boxer, Polydeuces.