Silverfish have flattened bodies and may be elongated or oval in shape. They have flexible antennae and small or absent compound eyes. They have short mandibles and relatively unspecialised mouthparts. Many species also have a number of short appendages on their abdominal segments, but the most distinctive feature of the group is the presence of three long, tail-like filaments extending from their last segment. The two lateral filaments are formed from the abdominal cerci (Hoell et al. 1998).