Mackerel is a common name for several species of fish, typically from the Scombridae family, known for their streamlined bodies and fast swimming habits. They are found in both temperate and tropical seas, often in coastal or offshore environments. Mackerel are characterized by their torpedo-shaped bodies, forked tails, and distinctive vertical stripes or markings. They are a good source of omega-3 fatty acids and are known for their rich flavor.