Based on the fishery resources monitoring data collected in Guanjingyang sea in Fujian from 2010 to 2011,the present study analyzed the biological characteristics(n=2 098)of large yellow croaker(Larimichthys crocea),including body length and weight,growth and death,sex ratio,and sexual maturity.von Bertalanffy growth equation and parameters of mortality rate have been used to analyze the current resources status of large yellow croaker in Guanjingyang sea,meanwhile,biological characteristics(inflexion age and critical age,etc.)of fishery have been discussed.The results indicate that the average body length is 132.6 mm,with the group of predominant body length 110-150 mm,accounting for 55.96%;the average body weight is 45.1 g,with the group of dominant weight 10-50 g,accounting for 61.77%.The juvenile large yellow croaker and recruit population have been the main catch targets.The relationship between length and weight was expressed as:W=2.001?10^-5L^3.006.The growth parameters of von Bertalanffy formula estimated by ELEFAN were L_∞=385.4 mm,k=0.43 and t₀=-0.32a,respectively,and flexion age is 2.2 years.Compared with the data obtained about large yellow croaker in Fujian,value of L_∞ has declined from 555.4 to the current 385.4,flexion age from 2.97 to 2.2,all these trends show that the group has been in serious status characterized with miniaturization and lower age.In addition,the growth coefficient shows an apparent increase from 0.36 to 0.43,which indicates a speedup growth in large yellow croaker.Total death coefficient(Z),natural death coefficient(M)and the coefficient of fishing death(F)are 3.12,0.45 and 2.67 respectively;the exploitation rate in recent years was 0.856.The increasing trend of M value may be related to the deterioration of marine environment in coastal areas of Fujian;and,due to the high-intensity catch of large yellow croaker,fishing death of such species is increasing sharply,from 0.84 to 2.67,which indicates that the stock of large yellow croaker has been over-exploited.Under the current resources status in Guanjingyang sea,great effort should be made to reduce fishing mortality and protect its environment so as to protect large yellow croaker.And due to the miniaturization and low age of large yellow croaker resources,controlling the catchable age(t₀)is suggested to be the main management.