5.2 The Survival Rate During the feeding experiment, the survival % expressed as mean ±SE showed significant increases in group 4 at 2 month of experiment and in all S. platensis supplemented groups vs. the control group after the third month of experiment (Table 2). 5.3 Hematological and Immunological Analysis A significant (p ≤ 0.05) increase of hematocrit (HCT) and nitroblue tetrazolium (NBT) were observed in all (with the exception of group 2 in case of NBT at 1st and 2nd month) S. platensis supplemented groups vs. the control group at all experimental period. On the other hand, Neutrophil Adherence values showed significant (p ≤ 0.05) increase in all S. platensis supplemented groups vs. the control group (Table 3). The increase in the lysozyme activity was significant in all fish groups given basal diet supplemented with S. platensis at the 2nd and 3rd month (Table 2).