sentences:  Silverfish and firebrats are related insects which consume starch, usually found in sizing or other treatments applied to fabrics, as well as plant-based textiles such as linen and cotton.Both are attracted to dark, moist climates, though silverfish prefer cooler temperatures, while firebrats tend towards warmer.Both are about 12 millimetres in length and either light or dark in colouring, depending on which type is present.