Altogether 98 species of the eggs and larvae of osteichthyes collected from the varied essential surveys in The Bohai Sea and Yellow Sea from April, 1982 to June, 1993 were recorded in this paper. Spawning periods of the fishes were described in greater detail. Biological characteristics of the eggs and larvae were also explicated, such as diameters of egg and its oil globule, structures of egg membrane and yolk, hatching time, and total length of newly hatched larvae, etc.