Yin and Yang Koi Fish Sumi-e Prompt

A minimalist sumi-e ink artwork showing two koi fish arranged as yin and yang on a white background with washi paper texture. The composition includes a bold red Japanese hanko stamp and a calm zen aesthetic.

Yin and Yang, two koi fish, one white, one black, minimalist Japanese sumi-e ink painting, black ink on white background with Washi paper texture, big Japanese red Hanko stamp signature, zen style, centred composition, studio lighting