At the end of the 45 days of experiment, significant difference was observed due to the fact that as the final weight and weight gain in the shrimp increased, the percentage of S. platensis in the diet increased, indicating a better outcome in these parameters with percentages of 30 and 40%. However, when compared to the commercial diet, lower results were observed, but with values close to those obtained with 40% supplementation. The literature has shown better results for growth with supplementation of S. platensis up to 25% in the diet for several fish species, but similar or better results compared to this study can be found if the percentage of this microalga is increased in diets (Table 4).