Fisherman Why do fishermen like to go fishing on rainy days and explain the reasons?

Because the oxygen concentration is low in rainy days, fish will float to the surface to breathe. There is oxygen in the water for fish to breathe. Before it rains, the atmospheric pressure drops, and the dissolved oxygen in the water is pushed out of the water surface by low pressure, so the dissolved oxygen in the water decreases. The oxygen in the water is reduced, and the fish can hardly breathe in the water, so they can only float to the surface to get enough oxygen.

This will make it easier to fish.