Abstract:The second radial of left pectoral fin is selected for the age determination material of Elentris oxycephala in the Dongjiang river, Guangdong. The relationship between length of the second pectoral radial (R, mm) and body length (L, mm) is expressed as L- 10.6565 + 54.3848R(r = 0.9939). The relationship between body length or body weight (W, g) and age can be described by the von Bertalanffy growth equation.Lt = 298.6 (1-e-0.2313(t+0.28)) Wt =577.4(1-e-0.213(t+0.028))3.According to the typical characterist...