Spider Jockey

Spider Jockey is a rare mob that appears as a spider being ridden by a skeleton. It is not actually a separate mob, as both the mobs take indivisual damage. They were added in Update 0.11.0.

Spawn
Spider Jockeys have a very low chance to spawn, with every Spider having 1% chance to be a spider jockey. The process can be made faster using a Monster Spawner.

trivia

 * The Spider controls the Jockey's movement.
 * It is possible for a Spider-Jockey to kill itself- the Skeleton may shoot the spider, and the spider's jumping may run the skeleton into it's own arrows.
 * If the jockey enters water, then the skeleton may jump off.
 * Currently, there are no Wither Jockeys.