The St. Lawrence Seaway is protected from seawater intrusion primarily by a series of locks and dams that regulate water levels and flow. These structures create a freshwater navigation channel, allowing vessels to transit between the Great Lakes and the Atlantic Ocean without mixing seawater with freshwater. Additionally, the natural geography and freshwater flow of the Great Lakes contribute to maintaining the separation between the two bodies of water.
Sea Way
Sea Way
That Is where the sea of Champlain made It's way to the Atlantic after the ice age 10.000 yrs ago
The Suez Canal
St. Lawrence seaway
The same way you Americans get it... From the sea.
The Suez Canal
The Suez Canal
It connects the great lakes to the Atlantic ocean by way of the St. Lawrence river.
Hudson Bay.
Internationale water home sea port and water way west sea port
That is the way they have adapted, it is the same as asking why a fish lives in water.