In canning, according to the different processing method, Canned mackerel can be classified as: mackerel in tomato sauce，mackerel in brine, mackerel in vegetable oil, mackerel in olive oil, mackerel in sunflower oil and other categories.
Mackerel is a firm-fleshed, torpedo-shaped sea fish. It is an excellent source of omega-3 fatty acids.
It can be cooked in many different ways, though baking, barbecuing, grilling and pan-frying are the most common. Mackerel is great in rillettes, fishcakes and burgers.
But it spoils quickly which, so always it has been canned to preserve, you can use it anyway and anytime.