Drain Fly Larva

Moist environments rich in decomposing organic matter, commonly found in bathroom drains, sewage systems, shower pans, and sometimes near pools or standing water.

Feeds on decaying organic matter, sludge, algae, bacteria, and fungi found in drains and stagnant water.

The larvae are aquatic or semi-aquatic and do not drown. They breathe through a tube on their posterior end. They are often seen wriggling in the slime layer (

Risks: They are nuisance pests and can breed rapidly in dirty drains. While they do not bite, they can mechanically transport bacteria from sewage to other surfaces. Benefits: They help break down decomposing organic material in the ecosystem, though this benefit is negligible in a home setting.