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 :) 魚の鱗 蛇の鱗 トカゲ 芸術家気取りのトガリネズミの体重計ブラシ
17 Snake, lizard and fish skin textures and scale brushes for adding that reptilian touch to your images ヘビ 魚 皮膚 スケール ブラシ
Fur Brushes, Scales, and Textile Brushes - Made in PS cs6 馬 髪 犬 Fur Brushes, Scales, and Textile Brushes