What is a very thin body of water that is bordered by land on two sides and connects to much larger bodies of water?

A very thin body of water bordered by land on two sides and connecting to larger bodies of water is called a strait. Straits serve as natural channels, allowing the passage of water between two larger areas, such as seas or oceans. They can be significant for navigation and marine biodiversity. Examples include the Strait of Gibraltar and the Bering Strait.