William Morris (1834–1896) was a prominent British designer and key figure in the Arts and Crafts Movement, known for his intricate and nature-inspired patterns. Although his work focused on stylized floral and botanical motifs, koi fish were not part of his designs. Instead, koi fish are more commonly found in East Asian art. If you’re thinking of a design that blends Morris’s style with koi motifs, it’s likely a modern reinterpretation that merges these two distinct artistic traditions.