bottom trawl surveys conducted in the Bohai Sea in August and October of 2009, stomach analysis and prey selectivity indices were used to study the feeding habits of , which is a released fish species. The results showed that fed on seven groups of more than 20 prey species, and mainly fed on shrimp and fish, accounting for 64.93%–76.59% of the total food composition, by percentage of occurrence. Thus, Alpheus japonicas and the gobiidae were the dominant prey species in August; however, Larimichthy polyactis) were the dominant prey species in October. Compared with the study performed in the 1990s, the feeding habits of have varied significantly, feeding on a higher proportion of shrimp prey and fewer fish. The dominant prey species were also different, and anchovy () was no longer the dominant prey species. Latreutes anoplonyx, and the gobiidae, but dislike small yellow croakers in August. In October, they prefer to feed on and small yellow croaker, but dislike . Influenced by the abundance of prey in the environment, there is some difference between the favorite food species and dominant prey species. Prey selectivity of is not entirely determined by the abundance of prey in the environment, but it does have a strong influence. The showed a preference for prey with low abundance in the environment, such as in August, and in October. It also selectively feeds on prey with high abundance in the environment, such as small yellow croaker and gobiidae. It can feed on with a stable proportion in August and October; however, this is not related to their abundance. The results also indicated that seasonal variations in the food composition and prey selectivity of is not only influenced by the abundance of prey in the environment, but also by nutritional requirements and prey selectivity of individual fish. increased slightly in recent surveys, and was restored to some extent by stock enhancement, yet its biomass is still less than 1% of the maximum historical biomass. Therefore, more could be released to restore biomass. The other important aim of this study was to evaluate scientifically and reasonably the ecological capacity for stock enhancement, based on food composition and prey selectivity of . According to the results of this study, combined with its biomass and the evaluation of food consumption, , 2.2 t gobiidae and 1.9 t Sebates schlegeli, the next study needs determine biomass and food consumption of those prey by other predators in the same nutritional niche