Moombas mainly use expressive body language to convey their meaning to humans, but have no difficulty communicating with other Moombas and Shumi in more animalistic sounds. Moombas can recognize people by smelling or licking their blood. Being the "final form" of a Shumi, Moombas are generally benign, good-natured and hard-working, as this is the most common form a Shumi assumes.