Effect of partially replacing fishmeal by soybean meal on growth, digestibility, food utilization of sea perch \%Lateolabrasx japonicus\% juveniles was studied in a laboratory. Six test diets contained 43% crude protein with an animal vegetable protein ratio of 1:0-1:1 79 In controls, the animals were fed chopped trash fish Results indicated that growth, digestibility, food utilization were reduced with increase in animal vegetable protein ratio The optimal proportion of fish meal and soybean meal in formulated feed of \%Lateolabrax japonicus\% was 1:0 72-1:1 15