Why do two groups of fish from different places sometimes converge?

Group life is to better protect themselves and facilitate foraging, as for why they can turn at the same time, it is because the fish sense the change of the current, the fish do not feel it with the eyes, but feel it with the scales, when the fish in the group turns, the water flow will change, and this change will soon be felt by other fish and react quickly, and this reaction cannot be felt through the human eye. So in the eyes of humans, it was almost the same turn.

Swarming is a common behavior in most fish, and throughout life, fish will show phased swarming, especially migratory fish. According to statistics, among the more than 20,000 species of fish recorded in the world, 25% of them will flock throughout their lives, and 50% of them will flock in the juvenile stage, which shows that fish swarming behavior is a common behavior.

In general, small fish are prone to forming swarms, which increases the safety factor and allows them to survive and thrive in an environment where large fish eat small fish. Interestingly, not only small fish like to flock but also some large predator fish, such as tuna, bonito, etc. Clearly, large predator fish swarms can find food faster than if they went it alone.

In addition to defense and predation, fish swarms also play other roles, compared with individual fish, for adverse environments, fish schools have better resilience, swarm swimming can also reduce the energy consumption of individual fish, and can also find migratory routes faster when migrating, and when it comes to the breeding season, most fish gather together to mate and spawn, which is more conducive to the reproduction of the race.

Natural selection, survival of the fittest, are all in order to better adapt to the environment.

It may be that there is the same path, but the main thing is to survive, and survival of the fittest is the law of nature.

Their movement is irregular, and secondly, it may be for survival.

Because that place is rich in resources and has plenty of microorganisms.

A lot of animal behavior is just to survive.

In order to survive, that place may be rich in minerals.

This should be for their own survival.

Because when they have the same path, they meet.

The biggest reason is to survive, in order to avoid danger, to use a kind of group power to confuse the enemy.