The Bekko Koi Fish is usually a white fish with black markings.  The Bekko has also been known to be red, or yellow with black markings.  The white Bekko is known as the Shiro Bekko Koi, the yellow is known as the Aka Bekko, and the red is known as the Ki Bekko.  The Japanese translation means “tortoise shell.”  The Bekko is commonly mistaken for the Utsuri Koi Fish.