What Part of an ocean or sea that extends into the land usually smaller than a gulf?

A bay is a part of an ocean or sea that extends into the land, usually smaller than a gulf. Bays are often formed by the erosion of the coastline by waves and currents. They can also be formed by the sinking of land or the rising of sea levels. Bays are typically characterized by their sheltered waters and calm conditions, making them ideal for swimming, fishing, and other water sports.