Canned fish refers to fish that has been cooked, preserved, and sealed in a can for long-term storage. Common types of canned fish include tuna, salmon, sardines, and mackerel. The canning process helps to retain the fish's flavor and nutritional value while preventing spoilage. Canned fish is a convenient and versatile food option, often used in salads, sandwiches, or pasta dishes. It is rich in protein and omega-3 fatty acids, making it a healthy choice. Additionally, canned fish has a long shelf life, making it a popular pantry staple for many households.