Answer:
The Sea of Monsters (also known as the Bermuda Triangle to humans) is a sea in which Polyphemus, Scylla and Charybdis, the Sirens, and other monsters and godly things, like Circe, the sorceress, live in. ... It was originally in the Mediterranean Sea in the ancient times.
Clarisse La Rue takes her ironclad CSS Birmingham between Charybdis and Scylla to enter the Sea of Monsters, which is located in the Bermuda Triangle. Clarisse decides to sail closer to Charybdis because she feels that her ship's cannons will be enough to destroy Charybdis and send her to Tartarus. In fact, Clarisse purposely faces Charybdis and Scylla because she wants the chance to destroy monsters, much to Annabeth Chase and Percy Jackson's chagrin.
As the group gets pulled closer to the whirlpool, Percy tried to control the waves, but the roar and strength of Charybdis is overpowering and Percy is unable to control the water. When they are in range, Clarisse orders her undead soldiers to fire and three shots hit Charybdis with no effect at all. When Tyson fixes the engines and they start to pull away, Clarisse orders them to stay close so they can keep firing. Before they can, Charybdis closes her mouth and the water covers her. She then releases a blast of water that causes the CSS Birmingham to go out of control and heavily damaged as the hull cracks. Even one of the cannonballs that Clarisse had fired is shot back and hits her ship. It is quickly discovered that the wave of water caused Clarisse's ship to sail too close to Scylla and one of her undead crew members is eaten right off the deck.
