The aim of the present study was to analyse the effect of supplementary feed earthworm powder on the body weight, gonadal development and the Gonado Somatic Index (GSI) in the freshwater fish C. carpio. It is well noted that reproduction is sensitive to the state of energy reserves and there is a balance between energy and homeostasis and fertility. In this view the study examined the effect of supplementary diet on growth and reproductive performance of fresh water fish male Common carp C.

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... io. The Earthworm powder with the composition of (0%, 5%,and 7.5%) were mixed with the normal fish feed diet during the month of June 2015 to December 2015.The body weight and the development of the gonads in the fishes were noted. The significant increase in the weight of the body (903.26 ± 0.08) and gonad (108.53 ± 0.019), GSI was increased during the month of August with the fishes fed with Supplementary feed 2(SF2) compared to the fishes fed with Control feed (CF) and Supplementary feed 1(SF1).