Bekko ("Beck-Oh"): Solid body colored koi with black markings. Utsuri are often similar in appearance, but are black koi with  single complementary color varieties. I like to think of Bekko as "Turtle" with markings on their backs only... unlike the Utsurimono whose dark body bands extend under/around the belly.

Bekko heads should be free of black markings and the  the same depth of color as the body. The black markings should be balanced symmetrically along the body of the Koi. A Bekkos' fins can have some black, as with Sanke.