The silverfish is a species of small, primitive, wingless insect. Don't let their small size be deceiving - they are just as much of a pest as any other unsanitary insect.
They get their name from their colour (a silvery, grey shade) and their fish-like movement, thanks to their tapered tails and antennas.
Silver fish are also notorious for destroying books, clothing, wallpaper and carpets with their droppings. They also are known to burrow through sealed food packages such as pasta or oats. You wouldn't want to find one of these in your porridge!