this isn't a tattoo but it has a similar theme to my idea. A beautiful sketch like this would be stunning.
Watercolor Vikkisalmela (c)
Koi Carp Mural Stencil. Fish Mural Stencils
Peaceful Balance by Marco Antonio Aguilar More
Contemporary Koi Art • Koi Fish • Modern Painting Reproduction • Abstract Koi Pond - Japanese Fish Art
KOI ART, KOI WATERCOLOR, KOI PAINTING, CODY TURTLE,
Kolors Koi Art Print http://society6.com/product/kolors-koi_print?curator=laurelbushman
Gene Gregorio's koi paintings Koi 36"x 18" 1800.00
Asian Koi Art Poster Print Japanese Carp Fish. $14.75, via Etsy.
"Harmony. Watercolor by Zaira Dzhaubaeva." this is literally the tattoo I've wanted since I was about 16