Drain Fly Larva

Moist environments rich in organic matter, typically gelatinous films in drains, septic tanks, and sewer pipes.

Decaying organic matter, bacteria, fungi, and algae found in slime layers within plumbing.

Larvae live submerged in the organic film of drains; they breathe through a small siphon. They undergo four larval instars before pupating and emerging as adult flies.

Generally harmless to humans but can indicate plumbing issues or hygiene needs. In large numbers, they are a nuisance; they help break down organic waste but can potentially transport bacteria from sewage.