Saba mackerel is a salted fish often served grilled, and it is a very common dish in Japan. In addition to being delicious, saba mackerel provides some health benefits which make it a worthwhile addition to your diet. The high-quality protein in Saba mackerel promotes healthy and strong muscles, and it’s also great for your skin, hair and immune system. A low-sodium teriyaki glaze or a simple sprinkling of black pepper could be all you need to make the filet taste delicious.