Explain the meaning of migration and describe the role of migration in fish life.

For animals, the problem of nutrition is very acute. When unfavorable periods come and the amount of food decreases, there is a risk of extinction of the species. In this regard, migration appeared – this is when animals leave their habitat for an unfavorable period, and then return back. For some, a change of location is important for reproduction and the animal travels thousands of kilometers to mate. For fish, it is as important as it is and ensures them the continuation of the genus. Some species of fish do not manage to come back, they multiply and die there.