Doitsu-goi (ドイツ鯉) Originated by crossbreeding many diverse set up versions with "scaleless" German carp (normally, fish with only only one line of scales alongside either side of the dorsal fin). Also created as 独逸鯉, four primary forms of Doitsu scale designs exist. The most common type (referred to earlier mentioned) https://www.propanraya.com/cara-merawat-ikan-koi-agar-tetap-sehat-dan-indah-di-kolam-rumah