I have been drawing lots of mermaids and fish, and even a few geckos. Here are some scales brushes that I made and found useful. You are free to use these for anything you like but please don't sell them :) fish scales snake scales lizard Arty Shrew's Scales Brushes
This is a set of photoshop brushes of reptile skin textures. The set contains 14 high resolution brushes of various reptiles(snakes, lizards etc). I used a max width and/or height of 1000px so the should work in all PS CS versions Enjoy darkdesign silver paul ripmeester Reptile Skin Brushes
17 Snake, lizard and fish skin textures and scale brushes for adding that reptilian touch to your images snake fish skin Scales Brushes