Why was perseus called a demigod?

Perseus was called a demigod because he was the son of Zeus, the king of the gods, and Danaë, a mortal princess. This divine parentage granted him extraordinary abilities and strength beyond that of ordinary humans. As a result, he was often involved in heroic quests and adventures, such as slaying Medusa and rescuing Andromeda, which further solidified his status as a legendary figure in Greek mythology.