Warning! If you have found this insect (silverfish) in your home, it’s a sign that you need to…see more…

Silverfish are nocturnal and photophobic—they hate light. If you see one during the day, it either got disturbed from its hiding spot or you have a significant infestation. They prefer dark, damp places like bathrooms, basements, kitchens, and attics.

What It Means When You See Silverfish
Here’s the truth: seeing one silverfish doesn’t mean your house is dirty. It means your house has conditions that silverfish find appealing.

They’re attracted to three things:

Moisture (humidity, leaks, damp basements)

Darkness (they’re nocturnal and photophobic)

Food (starches, sugars, paper, glue, fabric)

Silverfish are scavengers. They eat carbohydrates and proteins found in:

Paper and cardboard

Book bindings and wallpaper paste

Cotton, linen, and silk

Starchy foods like flour, cereal, and pasta

Dead skin cells (yes, they eat your dead skin—charming)

Glue and adhesives

Mold and fungi

So if you see silverfish, it’s not necessarily a sign that you’re a messy person. It’s a sign that your home has moisture, darkness, and a food source they can access.

Think of them as tiny, ancient houseguests who are terrible at paying rent.

Are Silverfish Dangerous?

Good news: they are not dangerous to humans.

Silverfish don’t bite. They don’t sting. They don’t carry diseases. They don’t transmit pathogens like cockroaches or rodents. They’re not poisonous, and they won’t hurt your pets.