The Lepisma adult body length is 1/2 inches excluding the tails at the end of the anal area. Their coloration ranges from gray to almost black, with a metallic sheen. The Ctenolipisma adult body length is 5/8 inches excluding the tails at the end of the anal area. Their coloration is a dark gray with 4 dark lines running the length of the body. All silverfish taper from head to tail. Immatures similar to adults in appearance, except for size. The scales appear with the 3rd or 4th molt. Feeding marks are irregular whether they are holes, notches along an edge, or surface etchings. Yellow stains, scales and or droppings may be seen on infested materials.