一位钓友向我提出一个有趣的问题:他钓鱼三十余载,从来未见过鱼睡觉,难道它不睡觉吗?要回答这个问题,得先从鱼的眼睛谈起。鱼的眼睛和其他动物不同,它没有眼睑(俗称“眼皮”),所以它在睡觉时,眼睛还是睁得大大的,从直观上来讲,好似没有睡觉,其实它已进入梦乡。俗话说:“鱼死不闭眼”,说的就是它没有眼睑的缘故。 An angling friend asked me an interesting question: He had more than thirty years of fishing and had never seen a fish asleep. Do not it sleep? To answer this question, we must first talk about the fish’s eyes. Unlike other animals, the fish’s eyes have no eyelids (so-called “eyelids”), so when it is asleep, the eyes are still wide-open. It seems intuitively that there is no sleep, but it has actually come to sleep. As the saying goes: “Fish do not shut eyes,” that is, it does not eyelid sake.