Koi Fish Line Art Colored

This is a colored version of Koi Fish - Tattoo Line Art by =msabas. Which can be seen here . I did it using Photoshop CS4. I haven't done much coloring in PS so I'm by no means a master at it or anything, but I'd like to improve. Once again, all credits to the design go to the original artist (=masbas), coloring done by me. Comments welcome