A hyper-realistic illustration of an ancient koi fish swimming gracefully in the ocean amid coral reefs and marine plants is depicted using vibrant shades of reds, pinks, whites, greens, grey, beige, and gold, resembling an ancient Japanese woodblock print. The scene captures intricate textures and meticulous attention to detail with a dreamy, soft pastel color palette, enhancing the underwater atmosphere. The artwork, presented in high resolution, features the shimmering scales of the koi fish in light pink and white hues, showcasing a focus on intricate details through digital painting techniques.