<![CDATA[The coastal waters of Muara Sabak Timur, located in Tanjung Jabung Timur Regency, Jambi Province, possess significant potential for marine fishery resources but are currently experiencing fishing pressure due to the extensive use of trawl nets. This study aimed to analyze the length-frequency distribution of the main trawl catches and to determine the proportion of fish that have reached the Minimum Legal Size (MLS) in the area. The research was conducted from March to May 2025 in Lambur Luar Village using a field survey method with a purposive sampling approach. Primary data were obtained through total length measurements of three dominant species: narrow-barred Spanish mackerel (Scomberomorus guttatus), silver pomfret (Pampus argenteus), and black pomfret (Parastromateus niger), with 120 specimens collected for each species. Length-frequency distribution was analyzed using Sturges’ formula, and the size at first maturity (Lm) was determined based on FishBase. The results indicated that most of the fish caught were below their Lm, with only 10% of S. guttatus, 32% of P. argenteus, and 21% of P. niger categorized as legally harvestable. This suggests that trawl operations in Muara Sabak Timur predominantly capture juvenile and sub-adult fish. The low selectivity of the trawl nets, caused by small mesh sizes (<2 inches), allows immature fish to be caught before reproducing, indicating the onset of overfishing that threatens natural recruitment. These findings highlight the urgent need for size-based management strategies, including the implementation of minimum mesh sizes, enforcement of species-specific MLS regulations, and the establishment of spawning protection zones. Promoting selective fishing technologies and enhancing fisher participation are essential steps toward achieving sustainable fishery management and maintaining the ecological balance of coastal resources in Muara Sabak Timur.]]>
