Abstract: This paper reported the embryonic development of rock bream Oplegnathus fasciatus which was cultured in South China Sea, China. Eggs were fertilized and incubated in a bucket at 25.64±0.77℃ and salinity 30~32. The diameter of fertilized eggs and lipid drops were 0.860±0.023 mm and 0.191±0.009 mm(Mean±SD), respectively. Twenty-two hours and 30 minutes after the fertilization, larvae were hatched. Body length of newly hatched larvae (age: 0 d) was 1.836±0.078 mm. The embryonic development schedule could be divided into nine stages which were cell division stage, blastula stage, gastrula stage, blastopore closure stage, Kupffer′s vesicle formation, tail-bud stage, heart beating stage, pre-hatching stage and hatching stage. Durations of division stage, blastula stage and gastrula stage were 3h, 3h and 4h 45 min, respectively.Effects of different incubation temperature on embryonic development were discussed. It indicated that gastrula stage and period from tail-bud stage to hatching stage were clearly influenced by incubation temperature.