Centaurs

Centaurs (ケンタウロス) are one of the first creatures that Straw Hats encountered on Punk Hazard and constitute Caesar Clown's army.

Appearences
Centaurs seem to have different variations, not following the ancient Greek and Roman myths of being half horse from the waist down, but instead having the lower half being any kind of animal. Some like Smoothie follow the traditional myths by being a horse centaur.

A variation of centaurs resembles the Satyrs, half-sheep half-human creatures. They are human from the torso up with the exception of the horns. Their lower halves are made up of the rear end and hind legs of a sheep. Unlike centaurs, they do not possess forelegs.

A last variation of centaurs consists in the Harpy (ハーピー) Monet, which got bird wings and bird legs thanks to Law's ability.

History
Centaurs were originally fully human, though the majority of them lost the use of their lower bodies due to an experiment gone wrong four years prior to the present. When Trafalgar Law arrived on the island, he used his Devil Fruit ability to give them new legs.

Centaurs

 * Brownbeard
 * Centaur Patrol Unit
 * Smoothie
 * Chappe
 * Run

Satyrs

 * Fen Bock

Harpy

 * Monet

Trivia

 * Just before meet the real centaurs, Luffy used Kinemon's lower body to make up a fake-centaur.
 * Even not being a satyr, Caesar Clown shows to have the same sheep-horns.