1. (any of a number of fishes of the family Carangidae)
scad


2. (any of several fast-swimming predacious fishes of tropical to warm temperate seas)
jack: :

3. (a California food fish)
horse mackerel, jack mackerel, Spanish mackerel, saurel, Trachurus symmetricus: :

4. (large elongated compressed food fish of the Atlantic waters of Europe)
horse mackerel, saurel, Trachurus trachurus: :

5. (largest tuna
to 1500 pounds
of mostly temperate seas: feed in polar regions but breed in tropics)
bluefin, bluefin tuna, horse mackerel, Thunnus thynnus: :