Minecraft wiki entry for Shulker, associated text: Entity data
Tags common to all entities[show]
Tags common to all mobs[show]
 APX: Approximate X coordinate.
 APY: Approximate Y coordinate.
 APZ: Approximate Z coordinate.
 AttachFace: Direction of the block the shulker is attached to.
 Color: The color of the shulker. Default is 0. Shulkers spawned by eggs or as part of End cities have value 16.
 Peek: Height of the head of the shulker.