Silverfish are small wingless insects 13-25 mm in length. The name Silverfish originates from their fish-like, silvery, light grey colour and appearance. Typically nocturnal insects, they thrive in damp, humid areas, including kitchens and bathrooms. Silverfish feed on starches and carbohydrates, such as flour and card. Treatment can involve a professional insecticide surface spray, combined with removing food sources and reducing humidity.