Gray silverfish
Ctenolepisma longicaudatum
The gray silverfish, also known as giant silverfish or long-tailed silverfish, is a small insect whose Latin name is Ctenolepisma longicaudatum. As with the silverfish the gray silverfish has scales that cover the body in a silvery sheen. The gray silverfish can also move very fast. Gray silverfish are about two centimeters long and are found in books and paper.