Doitsu-goi (ドイツ鯉) Originated by crossbreeding quite a few different established varieties with "scaleless" German carp (frequently, fish with only an individual line of scales along both sides on the dorsal fin). Also composed as 独逸鯉, 4 key varieties of Doitsu scale designs exist. The commonest kind (referred to over) provides https://www.propanraya.com/cara-merawat-ikan-koi-agar-tetap-sehat-dan-indah-di-kolam-rumah