Kharybdis is a sea monster that "lurks below" a "tongue of land", opposite of Skylla's mountain lair (212). Kharybdis is capable of swallowing "the dark sea tide", and three times a day "she spews it up and sucks it down again", "a whirling maelstrom" (212). Kirke considers Kharybdis more of a threat than Skylla, and that "the god who makes earth tremble could not save you" (212). Instead, she instructs Odysseus to face Skylla.