Acrisius (/əˈkraɪsiəs/; Greek: Ἀκρίσιος) was a mythical king of Argos, and a son of Abas and Aglaea (or Ocalea, depending on the author), grandson of Lynceus, great-grandson of Danaus. His twin brother was Proetus, with whom he is said to have quarreled even in the womb of his mother. When Abas died and Acrisius had grown up, he expelled Proetus from his inheritance; but, supported by his father-in-law Iobates, the Lycian, Proetus returned, and Acrisius was compelled to share his kingdom with his brother by giving Tiryns to him, while he retained Argos for himself.
Disappointed by his lack of luck in having a son, Acrisius consults the Oracle at Delphi, who warns him that he will one day be killed by his daughter Danaë's son. Danaë is childless and to keep her so, he imprisons her in a bronze chamber open to the sky in the courtyard of his palace. Zeus impregnates her in the form of a golden shower (some accounts say it is her uncle, Proetus, who impregnates her). Danaë becomes pregnant with Perseus. Acrisius puts the child and Danaë in a chest and throws it into the sea. Zeus asks Poseidon to calm the water; he does and Danaë and Perseus survive, washing up on the island of Seriphos. A fisherman named Dictys, brother of King Polydectes, finds the pair and takes care of them.