The Collaborative International Dictionary
mackerel shad
mackerel scad \mackerel scad\, mackerel shad \mackerel shad\n. (Zool.) A small silvery fish ( Decapterus macarellus) found from Nova Scotia to Brazil.
WordNet
mackerel shad
n. small silvery fish; Nova Scotia to Brazil [syn: mackerel scad, Decapterus macarellus]