Doitsu-goi (ドイツ鯉) Originated by crossbreeding a lot of unique proven types with "scaleless" German carp (frequently, fish with only just one line of scales alongside both sides in the dorsal fin). Also published as 独逸鯉, four key varieties of Doitsu scale designs exist. The most common kind (referred to over) https://www.propanraya.com/cara-merawat-ikan-koi-agar-tetap-sehat-dan-indah-di-kolam-rumah