this isn't a tattoo but it has a similar theme to my idea. A beautiful sketch like this would be stunning.
Carp fishing More
Peaceful Balance by Marco Antonio Aguilar More
Japanese carp Plus
Magnificent ink painting with koi fish, only the Japanese can use a brush with ink and make such a simple and divine masterpiece!!!
Koi Carp 2 by Emma Barratt, via Behance
Just the fish More
How to Paint Koi Carp in Watercolour - Practice Your Wet-in-Wet Techniques with Alison Fennell
Jumping Carp painting by Muramasa Kudo. Acrylic on gold leaf, part of his new series. Kudou Muramasa (1948-) 工藤村正