Fungus Gnat Larva

Scientific Name: Family Sciaridae

Order & Family: Order Diptera, Family Sciaridae

Size: 3 mm to 6 mm in length

Fungus Gnat Larva

Natural Habitat

Moist soils rich in organic matter, often found in indoor potted plants, greenhouses, and compost.

Diet & Feeding

Primarily feeds on fungi, decaying organic matter, and plant roots.

Behavior Patterns

Larvae are translucent with a distinct black head capsule; they require high humidity and often leave thin slime trails similar to slugs.

Risks & Benefits

Generally harmless to humans but can be a nuisance pest; large populations may damage the root systems of houseplants, leading to yellowing or wilting.

Identified on: 1/4/2026