In the muscle tissue composition of L. vannamei (Table 3) marine shrimp, higher concentrations of arginine, lysine and methionine were observed in animals fed with diets supplemented with 10 and 40% of S. platensis. However, it was found that the methionine content in animals fed with diet supplemented with 10% was lower when compared to the muscle demand values for this shrimp species fed with commercial diet. Whereas the imbalance in amino acids, even if it is represented by a single essential amino acid, has an immediate effect on meeting the protein needs. As regards the energy balance (Fox et al., 2004), it was observed that the diet containing 40% S. platensis provided the best concentrations of amino acids for growth performance in animals.