The lifecyle of salmon by estuary

The lifecycle of salmon is presented in the diagram.

Obviously, baby salmons live in the river, while adult ones tend to migrate to the ocean. Moreover, salmons should swim to maturate and spawn.

Initially, the cycle begins in the river where salmon live. After salmon spawn, eggs are incubated, spending some time. If the incubation process results emergence small salmon, those will live in the freshwater, next salmon having incubated are reared in the freshwater, then those migrate to the estuary to be bred.

Afterwards, salmon migrate into rearing areas in the coastal water, encouraging to those breeding. Subsequently, more and more mature salmon grow in the sea, and those move into spawning areas. Eventually, after migrating into the sea, salmon swim back into the river for incubation process, realising eggs.