The climbing perch, Anabas testudineus, is a hardy air-breathing fish suitable for aquaculture due to its ability to withstand harsh environmental conditions. Successful breeding and early rearing practices are vital for sustainable captive production. This study aimed to determine the optimal dose of salmon gonadotropin-releasing hormone analogue (sGnRHa) for induced spawning and the impact of green water technology (GWT) on early rearing of A. testudineus. Mature male and female breeders (30–35 g) received intramuscular injections of varying sGnRHa doses (10, 20, and 30 μg/kg).
Results showed that the highest spawning fecundity , fertilization rate, and hatching rate were achieved at 30 µg/kg sGnRHa. Additionally, green water, produced from Nile tilapia culture, significantly influences the survival and growth of A. testudineus larvae to the fingerling stage (Table 1) . Treatment comparisons revealed significant differences (p<0.5) with the highest survival rate and mean length recorded in Green water treatment (Table 2) . These observations showed the potential of green water mesocosm-based approaches in enhancing larval rearing pr otocols of A. testudineus for sustainable aquaculture .