The present study was done to assess the effect of Ascorbic Acid on growth rate of clarias batrachus fry. The fry were fed with A.A enriched infusoria diet for a 60 days. Infusoria is given with ascorbic acid enrichment with different concentration i.e. 5%, 10%, 15% in different treatment T1, T2, T3 respectively with 0% enriched infusoria i.e. Non enriched infusoria in control group. The AA is added in infusoria through bioencapsulation. Clarias batracus fry of weight 2-3 gm and were randomly distributed in each plastic tank of 100 l. Initial and final weight was measured at every interval of 7 days. After the culture of infusoria Ascorbic acid is added at different concentration and fed to fry in each tank thrice a day. T3 shows highest weight gain and specific growth rate followed by T2, T1 and control group. Thus T3 shows highest growth and control group shows poorest growth in control group.

Keywords : C. batrachus fry, bioencapsulation.