[Fr., from L. macula, a spot.] A well-known salt-water fish,marked with spots on its sides, and much used for food. They move about in vast shoals, and visit the British and American coasts in summer, following after herrings, sprats, or pilchards, on which they prey. They are caught by means of drift nets and shore weirs, but a common mode of capture is by hook and line. The hooks are baited with small pieces of mackerel skin ; but the mackerel is a very voracious fish, and will bite at a piece of red flannel, or anything brightly colored or of a glittering appearance. The common mackerel averages 14 inches in length, and weighs about 2 lbs.