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I think it's because they are like a buffer zone between salt and fresh water bodies. some fish ( other then salmon) are able to alter the way their body works so they can go from salt to fresh water and vs. Also, many species begin their lives in these areas and migrate when they are older.
What else can I help you with?
The place where a river empties into an ocean is called what of the river?
The Estuary Delta
What is the place where a river empties into the ocean is called?
Estuary
The area where a river meets the ocean and contains a mixture of freshwater and saltwater?
Estuaries
Where does fresh water joins ocean water?
that would be called an estuary
An area where river currents and an ocean tide meet is called an?
An estuary
What is a large body of salt water that is smaller than an ocean called?
estuary
What is A large body of salt water smaller than an ocean is called?
estuary
What is the name of the area where a river meets the sea or ocean?
This is called the "mouth" of the river.A stretch of a river whose depth varies with the sea tides is called an estuary, and may contain brackish water or saltwater.
Which coastal region is where seawater and freshwater mix?
The coastal region where seawater and freshwater mix is called an estuary. The mixed water inside the estuary is called brackish.
What is the name for when the sea meets the ocean?
I think that you mean where a river meets the ocean? Since the ocean and the sea are the same thing. It is called an estuary.
Where a river flows into the ocean?
estuary
Use estuary in a sentence?
An estuary is a place where fresh water meets ocean water.
