The beast that the Greek hero Perseus confronts to save Andromeda is the sea monster Cetus. This terrifying creature threatens Andromeda as a punishment from the gods for her mother’s arrogance. Perseus, aided by the gifts of the gods, successfully slays Cetus, demonstrating themes of heroism, love, and sacrifice. The encounter illustrates the classic hero’s journey, emphasizing bravery and resourcefulness in the face of adversity. This myth resonates with audiences as it highlights the struggle between good and evil, ultimately celebrating triumph over chaos.