Silverfish are nocturnal insects typically 13–25 mm (0.5–1.0 in) long. Silverfish are agile runners and can outrun most of their predators (including wandering spiders and centipedes). Silverfish consume matter that contains polysaccharides, such as starches and dextrin in adhesives.These include book bindings, carpet, clothing, coffee, dandruff, glue, hair, some paints, paper, photos, plaster, and sugar. They will damage wallpaper in order to consume the paste. Silverfish can also cause damage to tapestries. Other substances they may eat include cotton, dead insects, linen, silk, or even their own exuvia (moulted exoskeleton).