Abstract Species composition of fish eggs and larvae was investigated from August, November in 2014 and February, May in 2015. During the study period, the fish eggs were identified as belonging to 10 taxa. The dominant species of fish eggs were Engraulis japonicus, Sardinops sagax, Nuchequula nuchalis. These three species accounted for 80.8% of the total number of individuals collected. The larval fishes collected were identified into 17 taxa, 15 families, and 4 orders. The dominant species of larval fish were Engraulis japonicus, Repomucenus spp., Sardinops sagax. These three species accounted for 70.2% of the total number of individuals collected. All the species were assessed for their richness, evenness, diversity, and dominance to gain a measure of the biodiversity. The richness index was the highest in May (R=1.58) and lowest in November (R=0.63). The evenness index was the highest in February (J=0.91) and lowest in May (J=0.57). The diversity index was the highest in February (H?=1.62) and lowest in November (H?=1.22). Furthermore, the dominance index was the highest in May (D=75.2%) and lowest in February (D=52.6%). The similarity index of community structure showed the highest index between August and November (59.7%) and lowest index between August and February (6.2%).