She was a beautiful water-nymph, but she scorned Glaucus (Neptune's son) and angered Circe (an enchantress.) Circe made a mixture of poisonous plants and poured them in the water where Scylla bathed (on the coast of Sicily.) When Scylla went in the water up to her waist, she found herself surrounded by a brood of serpents and barking monsters. She tried to run away, but the serpents and monsters were a part of her. This gave her a terrible temper, and she would thereafter devour hapless sailors that came within her grasp.
Scylla lives in a cave opposite of Charybdis (which is a strong whirlpool.) This is believed to symbolize the currents and dangers of the Strait of Messina in the Mediterranean.
She was a beautiful water-nymph, but she scorned Glaucus (