This study compared the length frequency and average catch per unit effort (CPUE) of dolphinfish ( Coryphaena hippurus) caught using gill nets during two different fishing seasons (winter 1401 and spring 1402). Biometric data, including length and weight, were collected from 460 dolphinfish at four major fishing docks in Chabahar County. The length frequency of dolphinfish ranged from 69 to 111 cm. The average length in winter was 88.4 ± 4.9 cm and 86.7 ± 7.6 cm in spring. In winter, the highest frequency (19.3%) was observed in the 77-81 cm length class (45 fish), while the lowest frequency (0.4%) was in the 105-109 cm length class (1 fish). In spring, the highest frequency (19.2%) was in the 89-93 cm length class (44 fish), and the lowest frequency (0.4%) was in the 109-113 cm length class (1 fish). The minimum and maximum CPUE values in winter were 4.9 and 10.77 (kg/net panel/day), respectively, with an average of 8.4556 (kg/net panel/day). In spring, the minimum and maximum CPUE values were 6.15 and 9.9 (kg/net panel/day), respectively, with an average of 7.8083 (kg/net panel/day). While the length frequency of dolphinfish differed between winter and spring, no significant difference was found in the average CPUE between the two seasons.