Drain Fly Larva

Larvae are found in moist environments with organic matter, such as drains, septic tanks, grease traps, and sewage areas.

Larvae feed on the gelatinous film of bacteria, fungi, algae, and decaying organic matter found in drains and sewers.

The larvae live submerged in organic film; they have a small breathing tube to take in air from the surface. They undergo four larval stages before pupating.

Generally harmless to humans but can be a nuisance in homes; they benefit the ecosystem by breaking down organic waste, though large numbers indicate plumbing or sanitation issues.