Original Answer: No, she didn't because she couldn't control a sea monster, and she isn't alive because Percy Jackson cut her head of in the first book (the lightning thief).
Response: I really hate to flame, but Percy Jackson annoys me SO much. So to the person who made this message: PERCY JACKSON IS F-A-K-E! It's a STORY!
Improved Answer: It was only a coincidence that Perseus had to fight Medusa and the sea monster simutaneously. The sea monster was sent by Posiedon to take Andromeda, a princess, away from a king who had defiled him. And even if Medusa had been able to control that sea monster, she had died before Perseus fought the sea monster.
Comment: Hope that helps! =D
~Ethan
Sea Monster, most likely.
medusa and the sea monster
medusa.
Perseus killed the Gorgon Medusa and the sea monster that was about to devour the beautiful Andromeda.
No; she was at one point transformed from maiden into sea monster, by some accounts - in others she was a sea monster born from other sea gods.
He showed the sea monster (Kraken/Cetus/Sea Monster >.>) the head of Medusa which kills anyone who sets eyes on it.
Yes, the sea monster Kraken. He pulled out Medusa's head and turned it into stone to save Princess Andromeda.
Medusa and a ketos, which is a huge sea serpent. he turned it stone with Medusa head to save the princess Andromeda
Mummy, Medusa, Werewolf, The Zombies, Dracula, Frankenstein, Sea Monster of the Blue Lagoon, Werecat
Perseus kills Medusa, by cutting off her head, and the sea monster, by turning it to stone, using medusa's head.
She had an affair with the sea god Poseidon and was turned into the monster she is known as by Athena.
No- she did date the god of the sea before she got turned into a monster though.