"She has twelve legs, all writhing, dangling down
and six long swaying necks, a hideous head on each,
each head barbed with a triple row of fangs, thickset,
packed tight – and armed to the hilt with black death!"

– Homer

The Odyssey, Book 12, lines 99-102. Circe describes Scylla to Odysseus. She is a powerful and fearsome female monster with twelve tentacles and six heads full of deadly fangs.