It will rain. What will happen to the little fish?

It's going to rain, and small fish will float on the water.

Before the rainy weather comes, animals will have some abnormal behaviors. Due to the increase of water vapor in the air, the density of water vapor is smaller than that of air, and the airflow rises, which leads to the decrease of oxygen content in water, so small fish will float in the upper water to breathe oxygen.

Before it rains, water vapor will condense into small water droplets when it meets cold air at high altitude. These small water droplets are very small, with a diameter of only 0.0 1 ~ 0.02 mm and a maximum of only 0.2 mm ... They are small and light, and are held up in the air by the updraft in the air. It is these small water droplets that gather in the air to form clouds. These small water droplets will become raindrops and fall to the ground, and the volume will increase by about 1 10,000 times.