Cellulose and xylan are the most common Non-Starch Polysaccharides (NSPs); they are available in plants and they exhibit anti-nutritional effects. The present study is intended to detect cellulose and xylan degrading autochthonous gut bacteria in Indian major carps (Labeo rohita, Catla catla, and Cirrhinus mrigala) and exotic carps (Hypophthalmichthys molitrix, Ctenopharyngodon idella, and Cypr...