Bloodworm

Stagnant or slow-moving freshwater, silty pond bottoms, and occasionally moisture-rich indoor areas like drains or damp lint.

Decomposing organic matter, algae, and microscopic organisms found in sediment.

They are the larval stage of non-biting midges. They use hemoglobin to survive in low-oxygen environments, giving them their distinct red color. They typically live in tubes made of substrate.

Non-toxic and do not bite or sting humans. They are beneficial as a major food source for fish and birds, though their presence indoors can indicate excessive moisture or decaying organic material.