What Does Sumi Mean?

Sumi, pronounced “SOO mee,” refers to the black colouration found on koi fish. This deep black hue is essential for enhancing the aesthetic appeal of koi and serves as a vital element of their overall colouration. In the realm of koi breeding and exhibition, Sumi plays a significant role. It contributes to the balance and contrast in the fish’s pattern. Well-developed Sumi adds depth and richness to the koi’s appearance, making the fish more attractive to collectors and enthusiasts alike.