How does a salmon live in fresh water when there young and migrate to seawater and die in fresh water?

Salmon is the common name for several species of fish of the family Salmonidae. Salmon are amadromous, meaning that they live in both Fresh and Salt water. A salmon lives in lots of different environments during its whole lifetime. They are born in a river or stream. They then make their trip towards the ocean where they live for most of their life growing, eating, and preparing. Then, they stop eating and travel back to where they are born into Fresh Water. There they lay their eggs and soon afterwards, they die.