Mackerel is a saltwater fish that belongs in the same family as tuna. With flesh that is a darker pinkish hue, it has a bold flavour with a firm, chewy and slightly oily texture. It's a fast-replenishing fish so it ranks higher in sustainability than other fish in the same family.
IQF stands for Individual Quick Frozen. IQF results in a higher quality product compared to block freezing. It's good for food sustainability, as you can defrost and use the exact needed quantity instead of thawing the whole block.