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¹ Klongwan Fisheries Research Station, Faculty of Fisheries, Kasetsart University, Prachuap Khiri Khan, Thailand DOI : 10.4194/AQUAST2412 Viewed : 17 - Downloaded : 24 This study evaluated long-term growth, survival, and health challenges during earthen-pond rearing of mangrove red snapper (Lutjanus argentimaculatus) from juveniles to broodstock potential over 24 months. Juvenile fish were stocked at 200 per ponds and cultured for 24 months. Growth (ADG, SGR), survival, and health assessments were recorded, and sick individuals were laboratory-tested for pathogens. Results showed that average total length reached 47.3 cm and weight 1,959.4 g. ADG was 2.50 g/day and SGR was 0.35%/day. Final survival ranged from 75.5% to 92.0% (mean 83.8%). Water quality remained within acceptable ranges. Meanwhile, infections (viral nervous necrosis) and Caligus sp. parasites emerged around 20–22 months, reduced feeding and survival, and prevented attainment of broodstock size (3–7 kg). While baseline growth and survival data were established, broodstock-size targets were not met. Future directions included nutritional optimization, enhanced health management, and strengthened biosecurity to improve broodstock yield. Keywords : Aquaculture management Marine fish culture Pathogen in marine fish Red snapper culture