Larvae have chewing mouthparts. Larvae are common in standing or flowing water where they are bottom-dwelling scavengers, feeding on organic matter such as algae and decaying plants. They are more abundant in polluted water with excessive algal growth. Massive emergence of adults can occur at certain times. Adults can be attracted to light at night.
Immature stages are important as food for small fish.
The bloodworms sold in the pet trade for fish food are tubifex worms that are not insects but segmented worms. For additional information, contact your local Texas extension service agent, or search for other state extension service offices.