“…On the other side, some opinions suggested that, FF had no effect on growth carving and feed conversion of fish ( Zhou et al, 2003 , Aydın et al, 2011 ). The effect of FF on the performance of growth or feed efficiency parameters relied on a variety of factors, including the environmental condition, fish age or size, amount of dietary carbohydrate and protein, stocking density, feed quality, feeding time, the intervals between the meals, feeding behaviors, gut length, gastric evacuation time and stomach capacity ( Asuwaju et al, 2014 , Suharyanto dan Febrianti, 2015 , Abdel-Aziz et al, 2016 , Aderolu et al, 2017 , Guo et al, 2018 , Okomoda et al, 2019 ).…”