我们有时可以看到鱼从水中往上跳，这是为什么呢？鱼跳出水面的原因有很多：一是因为鱼儿喜欢戏水，它跳出水面是为了好玩；二是为了躲避敌害，使要吃它的鱼不能抓到它；三是生理上的变化，如许多鱼到了快要生殖的时候，身体里面就产生一些能刺激神经的东西，使鱼处在兴奋状态 Sometimes we can see the fish jumping up from the water, which is why? The fish jump out of the water for many reasons: First, because the fish like water, it jumps out of the water for fun; second, in order to evade predators, so that the fish can not eat it; Third, physiological changes, such as When many fish are about to reproduce, there are some things that can stimulate the nerves in the body so that the fish are in an excited state