红灯在当地也叫铁甲鱼，学名点鳍棘鳞鱼，这种鱼浑身的鳞片坚硬无比，摸起来十分粗糙，就像在摸铠甲一样。

红灯属于金鳞鱼科，身体为椭圆状，眼大且浑身为红白相间的鳞片，背鳍连续突出，带有明显的黑色。

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"铁甲鱼网图，侵删