koi fish by Terry Gilecki
different types of Koi chart
How to Draw a Koi Fish Printable Drawing Sheet by DrawingTutorials101.com
KOI This would be pretty as a mural in the bath.
Maruten Kohaku Isa
Beautyful Japanese Koi
Two Koi Swimming Towards Happiness Art Poster Print at TigerHouseArt
butterfly Ginrin Yamabuki (koi)
Under Tropic Skies by Terry Gilecki
this isn't a tattoo but it has a similar theme to my idea. A beautiful sketch like this would be stunning.