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A growth experiment was accomplished to study common carp nutritional effect on three traditional diets differs from its crude protein contain (25%, 30% and 35%). This experiment was carrying out in fish breeding project in the Agriculture and forestry college, Dohuk University in Summel city. Common carp of 150±5.20 g body size were stocked in cages each having 1m3 size and were fed frequently for 90 days. Results show that the highest growth performance were obtained with 30% protein diet while the poorest one was obtained with 25% protein diet. FCR ranged from 2.27 to 3.01.While the lowest Protein efficiency ratio were obtained when feeding fish on the diet protein have 35%cp. An accomplished experiment to study effect of breeding (natural and artificial) of common carp was carrying out in fish breeding project in the Agriculture and forestry Faculty, Dohuk University in Summel city. Fifteen common carp fish of 1.5±0.10 g body size were randomly stocked from each pond with similar densities having 60*40m size of each pond and were fed frequently for 60 days.