“…leucocephala ) leaf meal in common carp diet(Hasan, Macintosh, & Jauncey, ), rohu carp (Bairagi, Sarkar Ghosh, Sen, & Ray, ; Hasan, Roy, & Akand, ) and tilapia (Osman, Omar, & Nour, ), pawpaw ( Carica papaya ) leaf meal in African catfish diet (Akinwande, Alatise, & Ayanlude, ), roquette ( Eruca sativa Miller) in African catfish diet (Fagbenro, ) and white cowpea ( Vigna unguiculata ) leaf meal in tilapia diets (Olvera‐Novoa et al, ). The addition of leaf meal in fish feed could increase the quantity of carbohydrate content including the non‐starch polysaccharides that are being fed to fish (Haidar, Petie, Heinsbroek, Verreth, & Schrama, ). Edible carbohydrate polymers found in fish feed ingredients including high fibre plant sources that constitute the dietary fibre that cannot be hydrolyzed by the endogenous enzymes(Westenbrink, Brunt, & van der Kamp, ) but can be fermented by endogenous microbial enzyme to produce volatile fatty acid which have prebiotic effect and are good precursors for the development of probiotics (Ogueke, Owuamanam, Ihediohanma, & Iwouno, ).…”