Kitsune are fey creatures that appear as foxes with two or more tails, depending on their age; an additional tail grows every 100 years. Kitsune are grey, black, shades of brown, or auburn, until their ninth tail grows. By that time, their fur has become white or golden. Occasionally, a blue, green, or bright red kitsune is seen; these are almost always cases of a kitsune sticking itself into a dyer's vat and gaining bright and distinctive fur for a time.