A brackish body of water that lies behind a baymouth bar is called a(n)

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A lagoon is a body of water that is separated from the ocean by a baymouth bar, which is a sandbar or barrier that blocks the entrance to the bay. The water in a lagoon is brackish, meaning it is a mixture of salt and fresh water due to the influence of tides and freshwater inputs from rivers or streams. A spit is a narrow strip of sand that extends from the mainland into the ocean. An enclosed pond is not specific to this geographic feature. A tombolo is a deposition landform in which an island is connected to the mainland by a narrow strip of sand or gravel. A jetty is a type of coastal defense structure designed to protect the shore from erosion and other hazards.

A Brackish Body of Water That Lies Behind a Baymouth