'Modern Koi', Inspired by "Koi Traditional Japanese Painting", Watercolor Illustration by Jennifer Kraska [b., American], ~ [Isn't a tattoo but it has a similar theme to my idea. A beautiful sketch like this would be stunning].
Alberto Seveso's latest series of underwater ink photographs is entitled a due Colori. The images are made by taking high-speed photographs of two colors of ink mixing with water. The results are beautiful and serene studies of color and depth.