Likely a case-bearing moth larva (household casebearer)

Indoors in closets, stored fabrics, carpets, and dusty areas; larvae carry a small portable case.

Larvae feed on wool, fur, feathers, hair, lint, and other keratin-containing materials; adults do not feed.

The larva lives and pupates inside its spindle-shaped case, which may resemble a tiny fleck of debris. The photo alone does not confirm the species.

Larvae can damage natural-fiber clothing and textiles. They are not harmful to people or pets and provide little meaningful household benefit.