10.22376/ijpbs.2019.10.1.p1-12 Volume 5 Issue 1 2014 (January - March) The present study deals with the isolation and identification of intestinal bacteria from Common carp lessThan i greaterThan Cyprinus carpio. lessThan /i greaterThan and its effect on growth performance. Six experimental feeds such as Fl control (without probiotics), F2 (1ml of lessThan i greaterThan Proteus spp. lessThan /i greaterThan ), F3 (2ml of lessThan i greaterThan Proteus spp. lessThan /i greaterThan ), F4 (3ml lessThan i greaterThan Proteus spp. lessThan /i greaterThan ), F5 (4 ml of lessThan i greaterThan Proteus spp. lessThan /i greaterThan ), and F6 (1ml of yeast). Where prepared by using fish meal, Ground nut oil cake, wheat flour and tapioca. Fish were fed with the feeds at a rate of 4% of live body weight. And reared for a period of 30 days. Growth performance such as condition factor, FC, FCE, FCR, Growth, PG, RGR, Assimilation, Metabolism, GGE, and NGE, were calculated, after 30 days. Where ANOVA was studied FC, Growth, GGE and NGE. The results showed that growth parameters such as Feed Consumption, Feed Conversion Efficiency, Feed Conversion Ratio, Growth, Percentage Growth, Relative Growth Rate, Assimilation, Metabolism, Gross Growth Efficiency, Net Growth Efficiency was higher in F5 containing 4 ml of lessThan i greaterThan Proteus spp lessThan /i greaterThan . and lower in F1 control (without probiotics) P. SIVAKUMAR , M.R. RAJAN AND P. RAMACHANDRAN Probiotics, Isolation, Identification, Cyprinus carpio, Proteus spp. Growth Performance 835-839