Pegasus was an immortal winged horse, one of the two children of Poseidon and Medusa. Along with his brother, Chrysaor, Pegasus sprung from his pregnant mother’s neck after Perseus beheaded her. Chrysaor is depicted to be a young man.
With Poseidon’s help, another Greek hero, Bellerophon, planned to capture Pegasus.
With the new-found partnership, Poseidon and Ballerophon managed to capture the immortal winged horse, Pegasus.
Bellerophon used for many attacks Pegasus and rode him first in his fight with the Chimera. Chimera is usually depicted as a fire-breathing lion, with the head of a goat arising from its back, and a tail that ends with a snake's head.
Later Bellerophon was taking vengeance on Stheneboea , who had falsely accused him.
Bellerophon attempted to fly with Pegasus to heaven but was killed or by some accounts, lamed.