Sure, here are some sentences using the word "bays":
1. The ship sailed into the calm waters of the bay. 2. The bay was surrounded by cliffs and lush greenery. 3. Fishermen often gather in the bay to catch fresh seafood. 4. The bay is a popular spot for kayaking and paddleboarding. 5. The bay is home to a variety of marine life, including dolphins and sea turtles.