Doitsu-goi (ドイツ鯉) Originated by crossbreeding many different proven types with "scaleless" German carp (generally, fish with only a single line of scales along all sides with the dorsal fin). Also created as 独逸鯉, four principal different types of Doitsu scale styles exist. The most common style (referred to higher than) https://www.propanraya.com/cara-merawat-ikan-koi-agar-tetap-sehat-dan-indah-di-kolam-rumah