Inhabit vents; more muscular than sewer parasites; kill pests in or near home (ex. spiders, roaches, etc.); Often don't kill moths, instead making little "homes" for them (viewed as pets)
inhabit sewers; keep sewer clean and working; skinny and lizard-like; able to squeeze into tight spaces; good at swimming
can take over and control a mind; can replicate movements and duplicate words; often small and hard to identify outside of body.