The Matagot is a magical beast that resembles a large, black cat with bulging blue eyes.
They are spirit familiars that guard the French Ministry of Magic but will not harm anyone unless they are provoked. When attacked, they multiply and mutate becoming more aggressive. If taken from their magic environment, they reduce to the size and temperament of muggle domestic cats. Newt Scamander is familiar with them but does not include them in his book Fantastic Beasts and Where to Find Them. [CG]