Doitsu-goi (ドイツ鯉) Originated by crossbreeding many different set up kinds with "scaleless" German carp (generally, fish with only a single line of scales alongside either side on the dorsal fin). Also penned as 独逸鯉, 4 main varieties of Doitsu scale designs exist. The commonest kind (referred to previously mentioned) provides https://www.propanraya.com/cara-merawat-ikan-koi-agar-tetap-sehat-dan-indah-di-kolam-rumah