Moth fly larva

Damp areas rich in organic matter such as drain pipes, sewage treatment plants, and septic tanks

Decaying organic matter, fungi, and bacteria found in the gelatinous film layer of drains

They are sluggish crawlers that feed within the slime layer of pipes before pupating and emerging as adult flies

Generally harmless to humans but can be a nuisance; they help break down organic solids in sewer systems but may indicate plumbing or sanitation issues