What is the three perilous encounters that perseus experienced during his adventure?

Perseus faced three perilous encounters during his adventure: first, he had to confront and defeat the Gorgon Medusa, whose gaze could turn anyone to stone. Next, he encountered the sea monster Cetus, which he saved Andromeda from by using Medusa's head to petrify it. Lastly, Perseus faced the wrath of King Polydectes, who sought to claim the head of Medusa for himself, leading to a confrontation where Perseus used his acquired skills and weapons to defeat the king.