龟与甲鱼，属于龟鳖类动物，简单的说，就是几千万年前它们是一个祖宗。后来在不同的生活环境中进化出不同的形态。

甲鱼不适宜与乌龟一起养

饲养甲鱼需要足够深的水，加上甲鱼比较好动，所以它们的食量也比较大。吃得多，自然就拉得多，水也更容易脏。

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甲鱼都比乌龟更凶，张口就会咬人，养在一起可能会咬伤龟，或咬到人。

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