In the present study, the length-weight relationships (LWRs) of 148 specimens representing four species, including 20 specimens of Pseudorhombus javanicus, 70 Plicofollis dussumieri, 28 Scarus persicus and 30 S. fuscopurpureus collected from the Persian Gulf were estimated. The LWRs equations were found as W= 0.67×L2.23 for P. javanicus, W= 0.05×L2.38 for P. dussumieri, W= 0.62×L2.15 for S. persicus and W= 0.27×L2.41 for S. fuscopurpureus. The values of b ranged from 2.15 (S. persicus) to 2.41 (S. fuscopurpureus), with the coefficient of determination (r2) greater than 0.85. The present study presents the LWRs parameters for P. javanicus from the Persian Gulf, Iran for the first time and provides useful information for marine ecologists, fishery managers, the conservation of marine fishes, and the online database of FishBase.