Drain Fly Larvae

Found in moist, organic-rich environments such as drains, sewer lines, septic tanks, and damp soil contaminated with sewage.

They feed on the gelatinous film of bacteria, fungi, algae, and decomposing organic matter (biofilm) that accumulates in drains and pipes.

The larvae live within the slime layer of pipes, breathing through a small tube that breaks the surface of the water; they undergo a complete metamorphosis into small, fuzzy, moth-like flies.

While they do not bite or spread disease directly to humans, their presence indicates a sanitation issue or a leak; they can be a nuisance in large numbers but help break down organic sludge in drains.