There are several different types of Japanese koi fish. The most common type is the Kohaku, which has a white body with red patches on its sides and head. Other types include the Taisho Sanshoku, which is black and white with red patches; the Shusui, which is blue and white or gray; and the Kumonryu, which is black and white without patches. There are also many variations of patterned koi fish that feature different color combinations. These patterns can be used to create unique and intricate tattoos that represent personal stories or journeys.