The depicted diagrams illustrate the life cycle of the salmons from birth to the end of their life.
Overall, there are three main locations (upper river, lower river, and open sea) where salmons live throughout their life. It is interesting to note that the average lifespan of a salmon is nearly ten years.
Turning to the details, we can see that initially, adults salmons place their eggs next to the small stones which are located between reads, and these reads live in upper river where the flow of water is slow. After 5-6 months, fries, which are the 3-8 cm fish types, emerged from the eggs, and they live in lower river for about 4 years. Next, these fish turn into smolts whose size can range from 12 cm to 15 cm. Finally, they become adult salmons, living in open sea for roughly 5 years, and after that, adult salmons start the life cycle again by laying new eggs. Meanwhile, adult salmons can be 70-76 cm, so it is considered one of the largest fish species.
