about the lines, they just look like default thin lines.
if your using illustrator or similar, try selecting some of the more important lines (body line of the fish, head section?) and use a nicer brush. perhaps a wavey one, or something reminisant to the pond?
The image will be significantly larger on the tee than on the screen and you'll be able to truly appreciate the intricate design elements as well as the overall picture!
I do like it. I really do. However I feel that if it were done in the style of a koi fish that were to be in a tattoo parlor picture it would be bought more readily
Like it, like the waves... However the placement of the waves on the fish look a little like feet. Perhaps a different placement? Also, I think that if you added some gray definition in the waves, they would look more like waves (if you didn't want to move them). I have a picture in my head of traditional Japanese waves.... just can't explain it to you, lol.
Colours are … Black, Dark Grey, Grey, Light Grey, White
Hope you all like it!