Silverfish and firebrats are harmless to humans, but are considered pests because of their appearance.
These wingless, flat insects have two long, slender antennas on their head and three long, slender "bristles" at the back of their tapered carrot-shaped body. Sometimes these insects are called "bristletails." They are just over 1 cm long when fully grown. The young look like the adults (except they are smaller), and the eggs are whitish, oval, and about .8 mm long.
Silverfish are covered with shiny silver scales that give their body a metallic sheen. Firebrats mostly look like silverfish, but lack the silvery sheen. Their body is gray or brown with bands of dark scales, usually with many dark markings that give a mottled appearance.
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