While mackerel scad can be considered gamefish, they are usually used as bait. Mackerel scad are fairly important both to fisheries and to sportfishing. Mackerel scad usually live in subtropical seas at depths up to 400 m. The mackerel scad ("Decapterus macarellus") is a species of fish of the family, Carangidae. Mackerel scad ("Decapterus macarellus"), flying fish and other similar species are used to make kusaya.