Cave Spider

The Cave Spider[1] is a hostile mob using the same model as the spider, but with a blue skin color and smaller size.[2] They are more dangerous than the regular spider, but they in turn are much rarer than regular Spiders. Cave Spiders do not spawn naturally; they only spawn from monster spawners found in abandoned mine shafts. Their small size (0.7 x 0.7 x 0.5) allows them to fit through spaces one block wide and just half a block tall including those created by slabs, fence posts and two stair blocks facing each other. Cobwebs do not affect Cave Spiders.