Are small grey/silver color insects with a "fish-like" appearance commonly found on the interior of structures. Silverfish thrive in high humidity areas such as basements, crawlspace, restrooms, and kitchen areas. Although they are not specifically harmful to humans, they shed their exoskeleton similar to other pests that could have an effect of people with severe allergies. They typically consume cellulose and starches found in common household materials (books, wallpaper, boxes, etc.) make them a real nuisance.