Fluffy Creepers are a common mob found in Volcano Biomes. They are 1.8x bigger than a normal creeper and the fur on their body waves as they walk. They are initially hostile when approached but will not attack unless attacked.
Fluffy Creepers will try to move around in a long circle, then begin to close in while sprint-jumping and then jump up like a spider and damage the player. This is repeated in a strike-and-run styled attack method. They will only shove and prod when they are not physically provoked, but tend to push their targets off high instant-death cliffs and lava lakes.
Fluffy Creepers are commonly found in Volcano biomes, but can also (very rarely) be seen wandering alone in Deserts.