Why can fishing nets catch fish?

The principle that fishing nets can catch fish is to use the instinctive struggle and gregarious nature of fish, as well as the mesh of fishing nets and the tightening principle of being caught.

As soon as the fish touches the net, it will instinctively struggle, resulting in the tail, fins or gills of the fish being entangled in the net wire, which makes the fish unable to move. At the same time, fish will gather together because of the appearance of fishing nets, which further increases the probability of being caught. In addition, the edge of the fishing net is covered with lead pendants. After the fishing net is spread, it will quickly sink to the bottom of the water and move closer to the fish. When pulling the fishing net, it will slow down, and the pendant will stick to the bottom of the water and gradually close and slowly lift. The fish caught will not fall down because of the pendant.

The principle of net catching is to wrap the fish after the net is opened. Because fish are gregarious animals, they have gregarious characteristics, so when closing the net, no fish will escape from the bottom of the net alone, but all swim in groups, which will lead to the inability to escape from the net and eventually be caught.

There is also a lead pendant hanging beside the fishing net. After the net was opened, it quickly sank to the bottom of the water. When it is pulled up, the speed slows down and the pendant will gradually approach the bottom of the water. Then slowly lift it up. The fish caught in the net will not fall because of the pendant.