Possibly a fungus gnat larva or small soil-dwelling fly larva

Moist soil, decaying organic matter, compost, houseplant potting mix, and damp indoor debris.

Larvae feed mainly on fungi, algae, and decaying plant material; some may nibble young roots. Adults generally consume nectar or do not feed substantially.

Larvae remain in moist substrate and develop through several stages before pupating; adults emerge as small, dark, weak-flying gnats. The photograph is too blurred for confident identification.

Usually harmless to people and beneficial as decomposers, though abundant larvae can damage seedlings and houseplant roots. If found indoors, reducing excess moisture usually controls them.