She's not human,
but a destroyer who will never die—
fearful, difficult, and fierce—not someone 
you can fight.  There's no defence against her.
The bravest thing to do is run away. 
If you linger by the cliff to arm yourself,
I fear she'll jump out once more, attack you
with all her heads and snatch away six men,
just as before.  Row on quickly past her,
as hard as you can go.  Send out a call
to Crataiis, her mother, who bore her
to menace human beings.  Homer, Odyssey, Book 12

In Greek mythology, Crataeis was a nymph. According to Homer's Odyssey, Circe tells Odysseus that Crataeis is the mother of Scylla, the sea monster.

Greek Mythology