北鳅 Lefua costata(Kessler) běi qiū

北鳅 Lefua costata(Kessler) běi qiū ,须4对，较长。前鼻孔形成一短的管状突起，末端延长成须，前、后鼻孔分开。体被细鳞，无侧线。体侧的褐色纵纹在雄性个体中更为明显和延长。鳔后室游离于腹腔，呈长卵圆形，前端通过一细管和鳔前室相连。

百度翻译提供：

The northern loach lefua costata (Kessler) has 4 pairs of whiskers, which are long. The anterior nostrils form a short tubular protrusion, the end extends into whiskers, and the anterior and posterior nostrils are separated. The body is covered with fine scales, without lateral lines. The brown longitudinal lines on the body side are more obvious and prolonged in male individuals. The posterior chamber of the swim bladder is free from the abdominal cavity and is long oval. The front end is connected with the anterior chamber of the swim bladder through a thin tube.