Certain types of fish, such as salmon and tuna, are popular for their rich flavors and nutritional benefits. Salmon is known for its high levels of omega-3 fatty acids, which are beneficial for heart health. It is often found in cold waters and is a key ingredient in many dishes, including sushi. Another type of fish is cod, which is commonly used in fish and chips. Cod has a mild flavor and flaky texture, making it versatile for various cooking methods. It is also a good source of protein and is often found in both fresh and frozen forms in grocery stores.