Fatty fish, such as salmon, mackerel, sardines, and herring, are a good source of nutrients and are generally considered to be beneficial for health. These types of fish are high in omega-3 fatty acids, which are important for maintaining heart health, reducing inflammation, and supporting brain function. In addition, fatty fish are a good source of protein, vitamins, and minerals, and can be a valuable part of a healthy diet. It is generally recommended to include fatty fish in your diet at least twice a week. However, it is important to be aware that some types of fatty fish may also contain high levels of mercury, which can be harmful if consumed in large amounts. It is therefore important to choose your fish carefully and to follow guidelines for safe consumption, particularly if you are pregnant or nursing.