Drain Fly Larva

Moist organic matter, particularly in drains, sewage systems, and bathroom pipes.

Organic slime, algae, and decaying matter found in plumbing systems.

They live in the film of slime inside drains and emerge as adults after pupating; they are often seen wiggling in standing water or moist areas.

Harmless to humans as they do not bite or transmit disease, though they can be a nuisance indicating a need for drain cleaning; they help break down organic materials in the ecosystem.