In Australian Aboriginal mythology, I'wai is the culture hero of the Koko Y'ao. I'wai was a crocodilian man who brought most of the Koko Y'ao religious rites and ceremonies. The Aborigines of Australia have a polytheistic, animistic religion. ... A culture hero is a historical or mythological hero who changes the world through invention or discovery. ... Genera Crocodylus Osteolaemus Tomistoma A crocodile can be any of the 14 species of large, water-loving reptiles in the family Crocodylidae (sometimes classified instead as the subfamily Crocodylinae). ...