Which is known as fish moth?

Zygentomata is known as fish moth.
Zygentoma is an order in the class Insecta, and consists of about 550 known species. The Zygentoma include the so-called silverfish or fishmoths, and the firebrats.
The name "Zygentoma" is derived from the Greek (zygon), in context meaning "yoke" or "bridge"; and (entoma), "insects", literally "cut into" because of the segmented anatomy of typical insects.
Silverfish are so-called because of the silvery glitter of the scales covering the bodies of the most conspicuous species. Their movement has been described as "fish-like" as if they were swimming.