Juvenile Tilapia aurea were fed diets containing fish meal, soybean meal, or mixtures of these to provide 15, 22, 29, or 36% dietary protein. Average daily gain and food conversions were determined over a 12-week period. Growth rates of fish fed the 36% protein diets were greater than those fed the other protein levels. Within each protein level, the 100% fish meal diets produced the greatest growth, although no differences were observed between any of the protein sources when fed at the 36% protein level. No significant correlations were observed between protein level or source and body protein composition.