Fungus gnat (likely larva or pupa)

Moist potting soil, decaying plant material, greenhouses, and damp indoor areas. Adults may occur around houseplants and windows.

Larvae feed mainly on fungi, algae, and decaying organic matter, but may damage fine plant roots when abundant. Adults generally do not feed or consume only liquids.

Larvae live in moist soil and organic debris; adults are weak fliers attracted to light and often emerge from houseplant soil. Several generations can occur annually indoors.

Usually harmless to people and pets, though heavy infestations can weaken seedlings and houseplants. They also help decompose organic material and serve as prey for other organisms.