The effect of dietary, phosphorus on the growth and body, components of juvenile Synechogobius hasta was determined. Different percentages of dietary phosphorus (0.63, 0.77, 0.93, 1.06, 1.22 and 1.36) were tested by feeding the fish (body weight, 15.81 g±0.32 g、20 individuals each group、3 groups each percentage) at a surplus of 5%-10% above sattation for 35d. Dietary phosphorus did not significantly affect the specific growth rate, feed intake, feed conversion ratio and protein efficiency rate. Nitro-gen retention was found to be the highest in fish ted the diet containing 1.06% of phosphorus; however, this was not significantly different from other diets. Fish fed the diet containing 0.93% of phosphorus showed the highest phosphorus retention; similar phos-phorus retention rates were found in fish fed the diets containing 0.77% and 1.06% of phosphorus. Fish fed the diet containing the highest percentage of dietary, phosphorus were found to contain the least whole body lipid, lower than fish ted other diets (P