This study presents the length-weight relationships (LWRs) of four caught fish, including Drepane punctata (Linnaeus, 1758), Alectis indica (Ruppell, 1830), Argyrops spinifer (Forsskal, 1775), and Saurida tumbil (Bloch, 1795). During 27 tows, the fish specimens were captured by Cutlassfish trawl net, with 80mm mesh size in the cod-end, from March 2015 to April 2016. The fishing operation was conducted at depths more than 50m in southern waters of Bushehr (the northern Persian Gulf). The estimated b values were as follow: 3.17 for D.punctata, 2.59 for Alectis indica, 2.56 for A.spinifer, and 3.26 for S.tumbil. In the present study, new maximum total lengths for D.punctata (15.2-43.5cm), A.indica (21-69.5cm), and A.spinifer (15.3-66.5cm) were reported in comparison with previous researches.