Data of the current study show that, based on weight gain, FI, FER and survival, vitamin E requirement of Nile tilapia was not affected by dietary lipid levels and supplementation of 50 mg of vitamin E/kg diet (analyzed average value of 112 mg/kg)was sufficient for Nile tilapia fed diets containing an equal mixture of corn oil and menhaden fish oil ranging from 6 to 14%