Frozen mackerel fish refers to mackerel that has been cleaned, processed, and frozen to maintain its freshness and extend its shelf life. Mackerel is a popular saltwater fish known for its rich flavor and high oil content. Freezing the fish helps to lock in its taste and nutritional value. Frozen mackerel is versatile and can be used in various culinary preparations, such as grilling, baking, pan-frying, or even making fish stews and curries. It's a convenient option for those who want to enjoy the benefits of mackerel without the need for immediate consumption, making it a handy ingredient to have in the freezer for quick and nutritious meals.