|Son of Poseidon|
|Father of Pegasi|
Percy Jackson (half-brother)
|Height||Average height of horse|
|Appearances|| The Sea of Monsters (mentioned) |
The Son of Neptune (mentioned)
|Quests||Slaying the Chimera|
Pegasus is a winged horse who was born when his mother, Medusa was punished by Athena. He was born in the blood of Medusa along with Chrysaor.
In myths, Pegasus is the immortal son of the sea god Poseidon and Medusa. After Medusa was slain by the hero Perseus, Pegasus sprang up from her decapitated neck stump, along with his brother Chrysaor. Eventually, with the aid of Athena, the hero Bellerophon captured him. With his aid, Bellerophon was able to slay the Chimera. In time, Bellerphon's pride drove him to attempt to fly to the top of Olympus. Zeus punished him for his arrogance by sending a gadfly to sting Pegasus, which made Pegasus buck off Bellerophon, crippling him. Pegasus completed the trip to Mount Olympus and took his place in Zeus' stables. He was often viewed as carrying Zeus' thunderbolts. In some stories, Zeus eventually placed him among the stars.
Pegasus' offspring, also called Pegasus, are seen quite often. Pegasus is mentioned as the one true Pegasus up in the sky flying around the world.
When sailing in the Mediterranean Sea, the crew of the Argo II is attacked by Chrysaor. He reveals himself to be the brother of Pegasus, but hates his brother as he got all the attention. Percy also thinks about how this makes Pegasus his half-brother, making him somewhat related to all the Pegasi.
- Main article: Pegasus (species)
- Blackjack - a full black-coated Pegasus.
- Guido - a white Pegasus.
- Porkpie - a white Pegasus.
- An unnamed Pegasus is shown in The Battle of the Labyrinth when Percy whistles four times after he, Annabeth, Grover, and Tyson got out of the Marriott hotel's basement with Rachel Elizabeth Dare and Nico di Angelo.
- Scipio - a peanut butter colored Pegasus who is nicknamed Skippy.
|Species:||Centaur | Cyclopes | Dragon | Drakon | Empousa | Giants | Harpy | Hyperborean Giant | Ichthyocentaur | Karpoi | Laistrygonian Giant | Pegasus | Skolopendra | Stymphalian Birds | Telekhine | Satyr | Merpeople | Gorgon | Fire-Breathing Horse | Katobleps | Nymphs|
|Friendly Monsters:||Argus | Blackjack | Briares | Chiron | Don | Ella | Festus | Gleeson Hedge | Grover Underwood | Hippocampus | Mellie | Mrs. O'Leary | Ophiotaurus | Peleus | Scipio | Tyson | Tempest|
|Enemy Monsters:||Agrius and Oreius | Arachne | Basilisk | Charybdis and Scylla | Chimera | Chrysaor | Clazmonian Sow | Colchis Bull | Echidna | Euryale | Geryon | Joe Bob | Kampê | Manticore | Medusa | Minotaur | Nemean Lion | Polyphemus | Sphinx | Stheno | Typhon ||
|Neutral Monsters:||Cerberus | Erymanthian Boar | Gray Sisters | Gorgons | Furies | Flesh-Eating Horse | Gryphon | Hippocampus | Siren | Carnivorous Sheep|