Tabby cat the flanks and stomach. An "M" shape appears on the forehead, along with dark lines across the cat's cheeks to the corners of its eyes. Mackerels are also called 'fishbone tabbies', probably because they are named after the mackerel fish. Mackerel is the most common tabby pattern. The Classic (also known as "Blotched" or "Marbled") tabby tends to have a pattern of dark browns, ochres and black but also occurs in grey. Classic tabbies have the "M" pattern on their foreheads but the body markings have a whirled or swirled pattern (often called a "bullseye") on the cat's sides. There
Atlantic mackerel 2 years of age, though some fish may reproduce a season earlier or a season later. Though some fish are sexually mature at in length, even by only about half of females will be ready to reproduce. At , 90% of fish are capable of reproduction. An Atlantic mackerel can live for up to 17 years and attain a length of and a weight of . The Atlantic mackerel is of commercial importance to many Atlantic fisheries, which catch it with purse seines, trawls, gill and trammel nets, and trolling lines. Global annual catch is typically in the range of