Traditional fishery resources have declined in abundance or even been depleted in recent years as a result of multiple stress factors, including coastal development, marine environmental pollution, and high fishing pressure in the Yellow River estuary and its adjacent waters. has increased remarkably in abundance and been a dominant species in the Yellow River estuary and its adjacent waters, owing to its high adaptability, short life history, and high fecundity, as well as the decline in abundance of predators in these same waters. In order to ascertain the fishery and biological characteristics of to generate the basic parameters for its further stock assessment and management, the size composition, length-weight relationship, and sexual maturity of the species were examined based on the fishery and biological data collected in bottom trawl surveys conducted between June 2013 and May 2014 in the Yellow River estuary. The results showed that the standard length of the fish ranged between 25 and 154 mm, with a mean length of (87.77±24.181) mm. The dominant standard length class was 60-120 mm, accounting for 76.71% of the total abundance. The dominant class of body mass was 0.08-37.83 g, and the mean body mass was (9.1±6.905) g. The body mass class of 0-10 g dominated, occupying 63.03% of the total abundance of the species. The length-weight relationship with sex combined for the whole year was described as n=1842). Monthly changes in the sexual maturity periods and gonadosomatic index of were observed, where the reproductive period was from April to May and lasted to early June in the Yellow River estuary and its adjacent waters. There was no significant difference between sexes with regard to the relationship between percentage of sexual maturity and standard length of . A logistic curve was fitted to depict the proportion of sexual maturity in relation to standard length, and the parameters were derived from the curve, with a value of 0.039 and mean length at sexual maturity of 117.92 mm for the species in the Yellow River estuary.