Current study include of monthly changes in gonads of common carp Cyprinus carpio L. and golden carp Carassius auratus fish in Euphrates river passage in Samawa city. The results show that females outnumber males for both sexes and their sex ratio reached 5: 1 in November, the sexual function peaked in February 8.50 and 8.92 for male and female common carp, respectively, it reached 10.32 and 10.93 for male and female golden carp fish in March, respectively .The liver function was highest in March 1.66 and 1.86 for male and female common carp fish respectively, and 3.00, 3.19 for male and female golden carp in April, respectively .The highest percentage was found in the physical condition coefficient of both fish species 1.74 and 1.83 % in February for male and female common carp fish and 2.12, 2.24 % in January for male and female golden carp fish. The length-to-weight relationship was direct correlation, with height increasing by weight for both fish species.