鱼的生活

When some salmon reach the fingerling stage, they start their journey to the ocean...but some salmon stay where they are in the river, lake, etc. The salmon that go to the ocean have already matured for one year and have many obstacles ahead of them.

When the fish go down the rivers and go through the dams to the ocean, they get bigger and bigger. At the ocean they get food, grow, and get mature. If they don't get killed or eaten by predators or other hazards to their living, they return to where they hatched. Scientists don't really know how they can know which way to go, but they do have theories. Some of the theories are that the fish can taste the water. Early in their life they could have stored the taste in their brain. Another theory is that the salmon can see the stars and know where their home is and somehow can find their way home. There is another theory. A lot of people think this is the most likly one. The theory is that the salmon can smell their way