How to write 鲶

「鲶」 1. Same as "鲇" (nián). 同“鲇”。 2. General term for fish in the order Siluriformes, family Siluridae. They have large, flat heads, wide mouths, and four long whiskers on the upper and lower jaws. They are scaleless, with skin that is often covered in mucus. The back is dark gray, the belly is white, and the spines on the dorsal and pectoral fins are poisonous. There are about 2,500 species, distributed worldwide. They live in rivers, lakes, and marshes, resting on the bottom mud during the day and coming out at night to feed on small fish, shellfish, frogs, and other organisms. 鲶目鲶科鱼类的统称。头大而扁，嘴阔，上下颌有四根长须，无鳞，皮肤多黏液。背苍黑色，腹白，背鳍、胸鳍上棘刺有毒。约有二千五百种，分布于世界各地。生长于河湖池沼中，白昼栖伏水底泥中，夜晚出来活动，以小鱼、贝类、蛙类等维生。