Charybdis
Charybdis is a sea monster from Greek mythology best known for inhabiting a powerful whirlpool in the Strait of Messina, opposite the six-headed monster Scylla. Together they posed a deadly hazard to sailors navigating the strait between Sicily and mainland Italy. Charybdis is typically described as a female sea creature who swallows large amounts of water—often said to do so three times a day—and then spits it out, creating a swirling vortex that can engulf ships.
The creature's origins vary among ancient authors, but she is commonly treated as a dangerous sea spirit
In later tradition, Charybdis has become a byword for a perilous, inescapable danger. The phrase between Scylla