If you’ve ever flipped on the bathroom light to see a small, silvery, teardrop-shaped insect wriggle away and vanish into a crack, you’ve met a silverfish. These ancient, wingless insects are harmless to people but surprisingly destructive to belongings — feeding on paper, books, wallpaper, and fabric. And because they thrive in humidity, Florida homes are especially inviting. This guide explains what silverfish are, what draws them in, whether they’re dangerous, and how to get rid of them for good.
Quick Answer: How Do You Get Rid of Silverfish?
The key to getting rid of silverfish is moisture control: run a dehumidifier, fix leaks, and ventilate damp rooms like bathrooms, since silverfish can’t survive without humidity. Then remove their food sources (paper, cardboard, starchy items), store books and keepsakes in sealed containers, declutter, and seal the cracks where they hide. Silverfish are harmless — they don’t bite or spread disease — but they damage paper and fabric, and a persistent infestation is best handled with professional help.
What Is a Silverfish?
Silverfish (Lepisma saccharina) are small, wingless insects named for their silvery-gray, metallic sheen and the fish-like way they wriggle when they move. They’re nocturnal, fast, and secretive, favoring dark, humid spaces. Here’s how to recognize one:
| Feature | What to Look For |
|---|---|
| Shape & color | Teardrop or carrot-shaped body, silvery-gray with a metallic sheen; about 1/2 to 3/4 inch long. |
| Antennae & tails | Two long antennae up front and three distinctive bristle-like tails at the rear. |
| Movement | Quick, darting, side-to-side wriggle like a fish; they flee from light. |
| Where you find them | Bathrooms, kitchens, basements, laundry rooms, closets, and inside stored boxes. |
| Signs | Yellowish stains, tiny pepper-like droppings, and irregular holes or notches in paper and fabric. |
Are Silverfish Dangerous?
The reassuring news: silverfish are harmless to people and pets. They don’t bite, they don’t sting, and they don’t carry or transmit disease. What they do damage is your belongings. Silverfish feed on starches and sugars found in paper, books, cardboard, wallpaper paste, glue in book bindings, and natural fabrics like cotton, linen, and silk. Over time they can ruin important documents, photos, books, wallpaper, and stored clothing. In large numbers, their shed skins may also contribute to allergy or asthma issues for sensitive individuals. So while they’re not a health threat, they’re worth eliminating to protect your things.
What Causes Silverfish?
Silverfish infestations almost always come down to one thing — moisture — plus a food source and a way in:
- Moisture and humidity. Silverfish need high humidity to survive, so damp bathrooms, kitchens, basements, laundry rooms, and leaky areas draw them in.
- A starchy food supply. They feed on paper, cardboard, books, wallpaper paste, and starchy or natural-fiber materials.
- Clutter and stored paper. Stacks of paper, cardboard boxes, and cluttered storage give them both food and shelter.
- Cracks and hitchhiking. They slip in through foundation cracks, gaps around pipes, and can arrive inside cardboard boxes and secondhand books.
Silverfish Damaging Your Books or Keepsakes?
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How to Get Rid of Silverfish
Control the Moisture (the Root Cause)
This is the single most effective step. Run a dehumidifier in damp rooms, fix leaky pipes and faucets, ventilate bathrooms and kitchens, and address any standing water or condensation. Lower the humidity and silverfish simply can’t thrive.
Remove Their Food and Shelter
Store books, documents, photos, and keepsakes in sealed plastic bins instead of cardboard. Declutter paper piles, old newspapers, and magazines, and keep pantry items like flour and cereal in sealed containers. The less starchy material lying around, the less there is to eat.
Seal Entry Points and Hiding Spots
Caulk cracks and crevices in bathrooms, along baseboards, and around pipes, and repair torn screens. This removes hiding places and blocks silverfish from moving between rooms.
Deal With the Ones You See
Vacuum up silverfish and their eggs from cracks and corners, and use sticky traps along baseboards and in damp areas to monitor activity. For a helpful natural ally, note that house centipedes actually prey on silverfish.
In fact, if you’re seeing house centipedes, they may be hunting a silverfish population you didn’t know you had.
Want the Silverfish Gone for Good?
Prodigy’s pest control eliminates silverfish and helps you fix the moisture issues that attract them. Reach out for your free quote.
When to Call a Professional
Silverfish reproduce steadily and hide well, so a light problem can persist despite your best DIY efforts. If you keep finding them, notice ongoing damage to books or fabric, or can’t get on top of the underlying humidity, a professional can treat the infestation and target the cracks and voids where silverfish shelter. Since 2018, Prodigy Pest Solutions has helped Florida homeowners handle silverfish and other moisture-loving pests — learn more about our Florida earwig and silverfish control.
Frequently Asked Questions
| Question | Answer |
|---|---|
| Are silverfish dangerous? | No. Silverfish don’t bite, sting, or transmit disease. They’re harmless to people and pets, but they damage paper, books, wallpaper, and fabric, and in large numbers their shed skins may aggravate allergies in sensitive people. |
| What causes silverfish in the house? | Humidity is the main driver — silverfish need damp conditions to survive. Combine that with food sources like paper, cardboard, and starchy items, plus clutter and cracks to hide in, and you have ideal conditions. Damp bathrooms and stored paper are classic hotspots. |
| How do I get rid of silverfish naturally? | Lower the humidity with a dehumidifier and by fixing leaks, remove paper and starchy food sources, store books and keepsakes in sealed bins, declutter, and seal cracks. Removing their moisture and food is far more effective than any spray. |
| Do silverfish bite? | No. Silverfish do not bite people or pets. Their mouthparts are built for scraping starches from paper and fabric, not for biting skin. |
| What do silverfish eat? | Starches and sugars — paper, books, cardboard, wallpaper paste, book-binding glue, and natural fibers like cotton and linen, plus pantry starches like flour. This is why they damage documents, photos, and stored clothing. |
| Why do I see silverfish in my bathroom? | Bathrooms offer exactly what silverfish need: high humidity, moisture, and dark hiding spots. Reducing humidity with ventilation or a dehumidifier and fixing any leaks makes the room far less hospitable to them. |
Protect Your Home From Silverfish
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Pest Control Across Florida
Prodigy Pest Solutions provides silverfish and full-service pest control throughout our Florida service areas: