Silverfish are gray insects with very large and long appendages that prefer humid conditions and Queensland is perfect for them. They look like venomous centipedes but they aren't and don't bite humans, but they are still very harmful creatures.
They like damp areas like bathrooms and laundries and will loom in dark, solitary places, sometimes between the pages of a book. These insects feed mainly on sugar and starch-like products and enjoy wallpapers, coffee, dampness under carpets, discarded pasta and paintings.
Keeping food in air tight containers denies the silverfish sustenance and so does keeping dust to a minimum.
However, they can also eat people's furniture, books, and almost anything made with wood pulp or paper. These are creatures that breed fast, which is the case for all insects, and they can produce whole populations of creatures that are going to cause similar levels of damage to households and household goods.
Many people are also disturbed by their appearance, and they can find these creatures threatening even if they are relatively harmless to humans personally.