The mackerel (Scomber scombrus) is a highly migratory and economically important pelagic fish found in UK waters. Recognised for its striking striped back and shimmering green-blue colouration, mackerel forms large shoals in coastal and offshore waters. it plays a critical role in marine ecosystems as both a predator of small fish and plankton and as prey for larger fish, seabirds, and marine mammals. Mackerel is a staple of UK fisheries, valued for its sustainability and high omega-3 content.