Freshwater species can be fed formulated diets as early as mouth opening [18]. However, obtaining feeds that satisfy
the nutritional needs of larvae is difficult since mechanisms of digestion and absorption, as well as nutritional
requirements, change during larval development [19]. Although inert diets are well ingested at the early stage, larvae
can die with guts full of food, suggesting that they are unable to digest compound diets [18]. Luna-Figueroa et al.
(2001) evaluated effect of different protein levels on the juveniles of P. innesi. The weight and total length gain as
well as rates of growth were higher in fish (P