Silverfish are not dangerous to humans, but they cause havoc by eating human food, glue, paste, paper and fabrics like silk, linen and cotton. They gnaw their way through books, clothes, wallpaper and photographs. They thrive in conditions of warmth and high humidity.
Silverfish are primitive insects that are encased in silvery-gray scales. They have no wings but have three, threadlike appendages at the ends of their abdomens and two, long antennae. They move quickly and seek to stay out of the light.
Silverfish do not undergo complete metamorphosis like some other insects. Larvae look very much like adults. Unlike other insects, silverfish moult even after they have reached the adult stage.