Growth parameters such as individual weight gain (mg), SGR, biomass gain (%), food conversion rate (FCR), food conversion efficiency (FCE-%) and survival rate (%) of S. spinifrons juveniles are shown in Table 4. No significant interactions (P > 0.05) were found for individual weight gain and SGR. Biomass gain and FCR were significantly high for diets with 30% CP followed by 20% CP in interactions with low carbohydrate concentration contents. 30% CP+C low exhibited significantly higher FCE than other combinations. Survival for 30% CP + C low was the highest value (95%) however, differences only showed to be significant with 20% CP + C low.