Silverfish are small, fast-moving insects known for their silvery, metallic appearance and fish-like movements. In Southeast Alaska, they’re often found indoors—particularly in bathrooms, basements, and storage areas—where humidity levels are high and food sources like paper, glue, or fabric are present.

Silverfish are nocturnal and most active at night. They thrive in humid, warm environments and are typically more active in spring and summer—but can live indoors year-round if the conditions are right.

Silverfish are attracted to moisture and food sources like paper, glue, and fabrics. They often enter through cracks in foundations or are brought in via cardboard boxes or old books. Once inside, they hide in bathrooms, basements, attics, laundry rooms, and closets.

To prevent silverfish:

• Reduce humidity: Use dehumidifiers and ensure good ventilation in bathrooms, kitchens, and basements.
• Seal entry points: Caulk cracks and gaps around windows, doors, and baseboards.
• Store items properly: Keep books, papers, and clothing in sealed containers—especially in damp areas.
• Eliminate food sources: Clean up crumbs, dust, and stored food particles regularly.

Silverfish can reproduce indoors and establish infestations in moist, undisturbed areas. A few may go unnoticed, but infestations can grow quickly, especially if conditions are favorable and go untreated.

Silverfish feed on carbohydrates and proteins found in starches, glue, book bindings, wallpaper paste, cardboard, cotton, linen, cereals, flour, and even dead insects. Their broad diet makes them particularly damaging to both paper goods and stored pantry items.

If you’re seeing silverfish regularly, especially near stored items or damp spaces, professional pest control is recommended. Alaska Pest Management can assess your home, reduce conducive conditions, and apply safe, targeted treatments to eliminate silverfish and prevent their return.

Protect your belongings and your peace of mind. Contact Alaska Pest Management today for proven silverfish control solutions.