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Asian seabass, Lates calcarifer is a highly valuable and potential candidate species for mariculture. The objectives of the present study were to conduct an onboard fertilization trail to produce viable offspring and see the effects of stocking density of eggs on the fertilization, hatching and survival rate of Asian seabass juveniles. Eggs and sperm were collected during the full moon in May 2019 from the Moheshkhali channel estuary, the Northeast Bay of Bengal, by hand stripping method. Pooled sperm from two males and eggs from a female were used for insemination. Three egg stocking densities (T1- 37 40,000 eggs/batch; T2- 60,000 eggs/batch and T3- 80,000 eggs/batch) was used for this study. The one-way ANOVA (p