Sardines are a kind of fish that live in the ocean and can be eaten. They have some habits and characteristics that are quite special and attract people's attention. For example, sardines often gather together, and when they hunt and migrate, they can often be seen gathering together, sometimes forming very large schools. This phenomenon can be called a spectacle, such as the phenomenon of sardines gathering into a huge school in the record, which can form a large school of fish up to 7 kilometers long, 1.5 kilograms wide and 30 kilometers deep. Especially in winter, sardines gathering together is very common.
As mentioned above, among the habits of sardines, there is one that is more prominent, that is, they often gather together. Researchers have done special studies on this phenomenon to explore its causes and put forward various explanations:
1. Heating: Because the phenomenon of sardines gathering is more significant in winter, some researchers believe that they gather together to keep warm and resist the cold winter together.
2. Self-defense: Other researchers believe that sardines gather together for self-defense. Sardines alone are very small and can easily become food for other fish. If they gather together, they can protect themselves more effectively. In addition, there are often very effective sardines in the shoal, and surrounding them in the middle of the shoal can also protect them.
3. Spawning: There are also some views that gathering together is the need for spawning. This view is based on the seasonal regularity of the gathering phenomenon.
4. Ocean currents: Some people think that sardines gather together only because of the influence of ocean currents, and that this large-scale migration is only carried forward by ocean currents.
