Grenback mullet (Planilizasubviridis) is one of several types of fish that live in the waters of Pangkajene&Kepulauan Regency (Pangkep) and Takalar Regency which have high economic value. This research was conducted for 6 months (June 2021 – November 2021), aiming to compare the length-weight relationship and condition factors for mullets caught in Pangkep and Takalar waters (Makassar Straits). Sampling was carried out at the MacciniBaji Fish Auction Site (Pangkep) and at the Beba Fish Landing Base (Takalar). The fishing gear used during the research was gill nets with a mesh size of 1.0-2.5 inches. Overall, there were 349 fish samples caught in Pangkep waters, consisting of 124 male fish and 225 female fish, while in Takalar waters there were 174 fishes, consisting of 93 male fish and 81 female fish. In Pangkep waters, the length-weight relationship for male fish was W = 0.000103 L2.5699 (r = 0.9654) and female fish W = 0.000129 L2.5309 (r = 0.9788) while in Takalar waters for male fish was W = 0.000202 L2.4714 (r = 0.9524) and female fish W = 0.000220 L2.4626 (r = 0.9663). The average value of the condition factor for male mullets in Pangkep waters is greater than the female fish generally. The same thing was found in Takalar waters. The growth pattern of mullets (Planilizasubviridis) in Pangkep and Takalar waters is hypoallometric or negative allometric. The average value of the condition factor is greater than 1 which indicates a good condition of the fish.