https://en.wikipedia.org/wiki/Zygentoma Silverfish are so called due to the silvery glitter of the scales covering their bodies. Their movement is "fish-like" and makes it look as if they're swimming. The other name bristletails because of their three long caudal filaments. They are less than 1 cm long and found in damp corners or amongst books and paper in houses. Silverfish feed on cereals, paste, paper, starch in clothes, rayon fabrics and dried meats. Silverfish can sometimes be found in bathtubs or sinks at night, as they have difficulty moving on smooth surfaces and so become trapped.
Until the late twentieth century the Zygentoma were regarded as a suborder of the Thysanura, until it was recognized that the order Thysanura was paraphyletic, thus raising the two suborders to the status of independent monophyletic orders, with Archaeognatha as sister group to the Dicondylia, including the Zygentoma.
Phylum: Arthropoda Class: Insecta (unranked): Dicondylia Order: Zygentoma