Doitsu-goi (ドイツ鯉) Originated by crossbreeding quite a few diverse founded types with "scaleless" German carp (typically, fish with only one line of scales along all sides of the dorsal fin). Also written as 独逸鯉, 4 most important types of Doitsu scale styles exist. The most typical form (referred to above) https://www.propanraya.com/cara-merawat-ikan-koi-agar-tetap-sehat-dan-indah-di-kolam-rumah