金线鱼，俗名金线鲢、黄线、红三、红衫鱼，为辐鳍鱼纲鲈形目金线鱼科的其中一个种。

本鱼躯体椭圆稍延长，体被小型栉鳞。侧线仅一条，完整，中位略呈弧形。胸鳍有鳍条6－7枚。眼后方，胸鳍基底上方有一块朱红色小斑点。尾鳍上叶延长为丝状，但幼鱼期较无明显的延长。眼后至尾柄基部上方有一明险的金黄色纵带。胸鳍基底甚长，硬棘不甚坚固。背鳍硬棘10枚、软条9－10枚；臀鳍硬棘3枚、软条6－8枚。体长可达35公分。

Nemipterus virgatus, the golden threadfin bream, is a species of threadfin bream native to the western Pacific, from southern Japan south to northwest Australia including the Arafura Sea. It inhabits areas with mud or sand substrates and the young can be found at depths from 18 to 33 m (59 to 108 ft) while the adults can be found down to 220 m (720 ft). This species can reach a length of 35 cm (14 in), though most are only around 23 cm (9.1 in). It is one of the most important species of commercial fisheries in the East China Sea and northern South China Sea.