Doitsu-goi (ドイツ鯉) originated by crossbreeding a lot of diverse founded versions with "scaleless" German carp (usually, fish with only an individual line of scales together all sides from the dorsal fin). Also composed as 独逸鯉, 4 primary sorts of Doitsu scale designs exist. The most typical kind (referred to above) https://www.propanraya.com/cara-merawat-ikan-koi-agar-tetap-sehat-dan-indah-di-kolam-rumah