Drain fly larva

Moist areas with organic matter, such as drains, sewers, and rotting vegetation

Microscopic organic material, algae, and bacteria found in gelatinous films

They live within the biofilm of drains and can survive in low-oxygen environments. They are semi-aquatic and move by wriggling through moist sludge.

Generally harmless to humans but can be a nuisance in large numbers. Large infestations may indicate a plumbing issue or buildup of organic waste. They help decompose organic matter.