Calydonian Boar
Caeneus' legend is found in "Metamorphoses", where he is mentioned briefly as a participant in the hunt for the Calydonian Boar. Some time after this appearance, Nestor tells the story of Caeneus to Achilles in fuller detail, describing his transformation from female to male. In Ovid's retelling, placed in the mouth of the aged Homeric hero Nestor, Caenis, the daughter of Elatus (a Lapith chieftain) and Hippea, was raped by Poseidon, who then fulfilled her request to be changed into a man so that she could never be raped again; he also made Caenis invulnerable to weaponry. Caenis then changed his name to Caeneus and became a warrior, traveling all over Thessaly, and later taking part in the hunt for the Calydonian Boar.