The Atlantic mackerel is a fast-swimming fish found in the North Atlantic Ocean. It is known for its distinctive blue-green stripes and silver belly. This species typically grows to about 12 to 24 inches in length and can weigh up to 5 pounds. Atlantic mackerel are often caught for commercial and recreational fishing due to their tasty, oily flesh. These fish are highly migratory, moving in schools to find food, primarily small fish and plankton. They play an important role in the marine ecosystem and are a popular choice for dishes in various cuisines, including Mediterranean and Japanese cooking.