A Blind Person Gropes For Fish
There is a folktale about two blind people buying a fish together, taking it home and boiling it in a pot to prepare a delicious meal. After they carefully prepared the fish, they fished it in the pot, but they could not find it. So they quarrelled. One said that the other stole the fish, and the other was not willing to be outdone. He said that he did not steal the fish. Someone must be playing tricks. The more they quarreled, the more fierce they became. The neighbors heard that the fish had already jumped onto the pot. The fish had not been cooked at all.
This idiom refers to doing things blindly and lacking investigation and research.
瞎子摸鱼
有这样一个民间故事，两个瞎子合伙买了一条鱼，拿回家放在锅里煮，准备美餐一顿。他们精心精意做好后，就在锅里捞鱼，可是怎么捞也没捞着。于是俩人就吵起来了。一个说另一个偷吃了鱼，另一个也不甘示弱，说他没偷吃，肯定是有人在捣鬼。俩人越吵越凶，邻居闻讯原来是鱼早就跳到锅台上了，鱼根本就没有煮过。
这个成语比喻做事盲目，缺乏调查研究。