Oysters are a type of bivalve mollusk found in marine and brackish waters. They are known for their unique, irregular shells and are often consumed as seafood. Oysters can be eaten raw, cooked, or used in various dishes, making them a popular delicacy in many cultures. In addition to their culinary appeal, oysters play a vital role in their ecosystems. They help filter water, improve water quality, and provide habitat for various marine species. Their ability to form reefs also contributes to coastal protection, making them an important species for both the environment and the economy.