Silver pomfret is an economically valuable fish, which has a wide distribution in China from Bohai Sea down to South China Sea. Specimins of this experiment were collected monthly from the East China Sea. The observations of annual ovarian histological changes show as follows:1. The spawning season of the fish in the East China Sea is from May to June. After spawning,the ovary soon degenerated, by the end of this it will develop into stage ll'and remain in this stage over the whole winter. The ovary begins to develop once more in the last ten days of the next March; it will not approach to stage Ⅳ until April.2. During the development of oocytes oil-globule structures occur in the inner spaces of the cytoplasm, while the yolk granules appear in the early time of the large growth stage in the outer space of the cytoplasm.3. The two egg membrane layers, zona radiata and gluey membrane co-exist in the whole development course of the oocytes. In the matured stage zona radiata disappeared, there is only gluey mambrane left.4. According to the spawning behavior of silver pomfret, the fish should be classified into short-term batech-reieasing pattern.