With the decrease in traditional economic fish resources, has become one of the dominant fish species in the Haizhou Bay ecosystem, playing an important ecological role in the food web. is a benthic fish species widely distributed in the China seas and Japan Sea, and in the waters around the Korean Peninsula. Using the samples collected from the bottom trawl survey in the Haizhou Bay during the autumn of 2011 and 2013-2015, 733 stomach samples were analyzed to study their feeding ecology, including diet composition, feeding intensity, feeding strategy, and prey selectivity. The results showed that the prey items of included more than 80 species, and shrimp and fish were the predominant prey taxa, with the index of relative importance of 97.14% and 1.15%, respectively. Latreutes planirostris, were the most important prey species. The results of the cluster analysis showed that the diet composition did not change significantly with the increase in body length. The average similarity coefficient of the food composition of was 86.74% among different size classes. This might be because the samples were collected in autumn. The samples reached or were close to adulthood, with their mouth, teeth, gill rake, and other feeding organs developed perfectly. The feeding intensity was described by the percent of empty stomachs and the mean stomach fullness index. The percent of empty stomachs of P> 0.05), but the mean stomach fullness index varied during the growth period ( was higher than that of large individuals. This is because the growth rate of small-sized is faster than adalts; they require more energy from prey. The feeding of fish is generally affected by several variables, including the development status of fish, the type and abundance of prey species, environmental conditions, and other factors. In this study, the generalized additive model (GAM) revealed that the feeding intensity of was affected significantly by salinity, water temperature, and latitude (< 0.05), whereas, the effects of body length, longitude, and water depth were not significant (>0.05). It will help analyze the factors that affect feeding habits of fish, understand the feeding status of fish, and examine the current situation and development of fish and their prey species, in order to make reasonable resource development and utilization decisions. The feeding strategy analysis further revealed that is a generalist predator and mainly feeds on shrimp and fish. The general feeding habit is an adaptive feeding strategy for fish that facilitates the adaptation of fish to variable environmental conditions, regulating the relationships with competitors. By calculating the prey selectivity index, it was found that there was a difference in the composition of favorite prey items and actual feeding prey items. The feeding ecology of is affected not only by the abundance and availability of prey, but also by strong active selectivity. These results will provide basic data to further understand the trophic dynamics in the Haizhou Bay ecosystem. It can also provide scientific reference for the protection and rational utilization of resources in Haizhou Bay.