The discussion of the master was conducted by student Zahraa Adel Rahima, which took place on Tuesday morning, 5-7-2022, at exactly nine o’clock, and it was entitled (The Effect of Saccharomyces cerevisiae on the quality of the diet and the growth performance of young common carp fish Cyprinus carpio L.). The thesis included the effect of adding Saccharomyces cerevisiae yeast in different proportions in the manufacture of fish feeds and knowing the extent of its impact on growth parameters and chemical composition of feeds and fish, physiological, microbial and blood aspects, the health status of fish and the enhancement of natural flora as a booster, prebiotic and a single-celled protein source, which contributes to strengthening and enhancing fish health.