The length-weight relationship was derived for the golden grey mullet, Liza aurata (Risso, 1810), from Guilan, Mazandaran and Golestan in southern Caspian Sea. A total of 90 adult individuals of the L. aurata were collected by beach seine and preserved in 4% formalin. Total length and weight ranged from 29.6 to 57.4 (cm) and 165.3 to 1285.4 (g) respectively. The Length-weight (LWR) was determined according to the power regression model. The relationship between total length and weight was described in L. aurata in Guilan W= 0.009L2.9219 (R2 = 0.9821), in Mazandaran W= 0.0081L2.942 (R2 = 0.9884) and in Golestan W= 0.0072L2.9701 (R2 = 0.9616).
