Shusui - (shoo-sue-ee) : The doitsu (German) version of the Asagi. Doitsu koi are scaleless. The red will usually extend above the lateral line and large scales run along the top of the koi from head to tail and occasionally across the lateral line as well. This variation was produced almost 100 years ago by crossing the Asagi with the German-Scaled common carp. It is the only doitsu (scaleless) Koi that has its own class designation.
