Conger myriaster is a fish of high economic and nutritional value in China. It is distributed throughout the Yellow Sea, East China Sea, and Bohai Sea. There have been few studies of this species, focused mainly on fishing, feeding ecology, resource distribution, breeding, and genetics. To explore the relationships between the morphological traits and body weight of C. myriaster, the body weight (Y) and 11 morphological traits were measured, including the total length (X₁), snout-vent length (X₂), tail length (X₃), head length (X₄), snout length (X₅), eye length (X₆), head length behind the eye (X₇), length before the first dorsal fin (X₈), trunk length (X₉), head width (X₁₀), and the interorbital space (X₁₁). The direct and indirect effects of the morphological traits on body weight were studied by correlation and path analyses. A stepwise regression method was used to establish a regression equation in which the morphological traits were independent variables and the body weight was the dependent variable. The best curve models of 4 morphological characters and body weight were obtained by curve fitting. There was a positive correlation between the morphological traits and body weight of C. myriaster, and the correlation coefficients reached extremely significant levels (P<0.01). The correlation coefficient of snout-vent length (X₂) and body weight was the largest (0.970), snout-vent length (X₂) had the largest direct effect on body weight (0.450), and head width (X₁₀) had the largest indirect effect (0.431) on body weight through the snout-vent length (X₂). The direct determinate coefficient of snout-vent length (X₂) on body weight was the largest (0.203) and the largest joint determinate coefficient was for snout-vent length (X₂) and head width (X₁₀) (0.172). The multiple regression equation of the morphological traits and body weigh was Y=-113.859+6.481X₂+49.213X₆+ 11.514X₇+20.145X₁₀ (R²=0.954). The best-fitting models of snout-vent length (X₂), head length behind the eye (X₇), and head width (X₁₀) on body weight were the exponential functions, and the model equations were Y=1.466e^0.287X, Y=1.435e^1.328X, Y=1.970e^1.974X, respectively. The best fit model of eye length (X₆) and body weight was linear, and the equation was Y=-77.460+222.093X. Snout-vent length (X₂) and head width (X₁₀) were the main selective characteristics of C. myriaster, and eye length(X₆) and head length behind the eye (X₇) were auxiliary selective characteristics. These results provide valuable information and a theoretical basis for C. myriaster selection.