Drain Fly Larva

Moist environments containing organic matter, such as drain pipes, sewage treatment plants, septic tanks, and wet compost.

Decomposing organic matter, algae, bacteria, and fungi found in the gelatinous film (slime) of drains.

Larvae live within the slime layer of drains and are highly resilient to temperature changes and low oxygen; they progress through pupal stages to become fuzzy, moth-like adult flies.

Generally harmless to humans but can be a nuisance in large numbers; they help break down organic waste in drains, though heavy infestations may indicate plumbing issues or plumbing clogs.