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Nutrition plays significant role in the survival, growth and physiology of fish. Snow trout Schizothorax richardsonii larvae were cultured under three feeding regimes: control diet (diet D1) and test diets, supplemented with vitamin C (800 mg/kg diet, diet D2) and Achyranthes aspera seeds (5 g/kg diet, diet D3). There was no significant (P> 0.05) difference in the survival rate of larvae cultured under three different feeding regimes. Significantly (P< 0.05) higher average weight and specific growth rate and lower food conversion ratio were found in D3 diet fed larvae compared to others. Amylase, total protease, trypsin and lipase activities were significantly (P< 0.05) higher in D3 diet fed larvae and chymotrypsin activity was significantly (P< 0.05) higher in D2 diet fed larvae compared to others. Dietary supplementation of vitamin C and Achyranthes aspera seeds improved immune system as myeloperoxidase and nitric oxide synthase levels were significantly (P< 0.05) higher in enriched diets fed larvae compared to the control one. Reduced lipid peroxidation was recorded in enriched diets fed larvae as thiobarbituric acid reactive substances level was significantly (P< 0.05) lower in D2 and D3 diets fed larvae compared to the control diet fed larvae.