Likely silverfish

Indoors, especially humid, dark areas such as bathrooms, basements, and spaces near stored paper or textiles.

Feeds on starches and carbohydrates, including paper, book bindings, glue, crumbs, and some natural fabrics.

Wingless, fast-moving, and mostly active at night; hides in cracks and can survive for years while molting repeatedly.

Harmless to people and pets, but may damage books, paper, wallpaper, and stored fabrics.