Silver Fish are light are light grey to blue color with tapered abdomens that looks like a fish like appearance they eat mostly materials which contains high level of starch, mostly glue paper & sugar. While silverfish are harmless to the human body, they do cause damage to clothing, books, papers, food in pantries and wallpaper. Silverfish leave small holes in materials they bite and may also cause yellow staining. Look for their presence in dark and damp locations such as bathrooms, under sinks and in garages.