Scylla
She is a sea monster of Greek mythology who, together with Charybdis, lurked to threaten the passage of ships sailing through the Strait of Messina. Her dwelling was an underwater cave on the continental side.
According to the legend, a very beautiful sea nymph rivaled Circe the sorceress, as both desired the god Glaucus. To get her way, Circe poisoned the waters so that Scylla was transformed into a hideous monster.