Fungus gnat larva (likely)

Moist potting soil, decaying plant matter, and damp organic debris indoors or outdoors.

Larvae feed mainly on fungi, algae, and decaying organic material, but may nibble plant roots when populations are high.

Legless, translucent larvae with a dark head capsule; they live in moist substrate and pupate in the soil. Adults are small, dark, short-lived flies attracted to light.

Usually harmless to people and beneficial as decomposers. Heavy infestations can damage seedlings and houseplant roots, causing wilting or poor growth.