In order to reduce the phosphorus content in the effluent and adjust the phosphorus content in artificial feed for aquaculture,a growth trial was conducted to estimate the effects of dietary phosphorous levels on growth performance,whole body composition,and serum biochemical indicators of juvenile yellow-headed catfish (Pelteobagrus fulvidraco).Three extruded diets (commercial yellow-headed catfish diet-based) were formulated to contain Ca(H2PO4)2 levels at 25,15,5 kg/t of diet (kg of Ca(H2PO4)2/t),respectively.Each diet was fed to triplicate groups of 15 fish (initial average body weight of 3.2 g) over 4 weeks.At the end of the trial,specific growth rate (SGR) and weight gain (WG) of the fish fed with the diet containing 15 kg/t was significantly higher than the other groups (P<0.05).Body crude protein content of the fish fed with the diet containing 25 kg/t had significantly increased compared with those fed the diet containing 5 kg/t(P<0.05),whereas both of them did not have significant difference between 15 kg/t treatment groups (P>0.05).Serum superoxide dismutase (T-SOD) of the fish fed with the diet containing 15 kg/t was significantly higher than the other 2 dietary treatments (P<0.05).There was no significant difference in alkaline phosphatase (AKP),calcium,and phosphorus in serum among 3 dietary treatments (P>0.05).The results suggested that phosphorus content in the current commercial feed for juvenile yellow headed catfish could be reduced from 25 to 15 kg/t,and the growth performance,body composition,and immunity of this fish would not be diminished.