Mackerel is a common name applied to a number of different species of fish, mostly, but not exclusively, from the family Scombridae. They may be found in all tropical and temperate seas. Most live offshore in the oceanic environment but a few, like the Spanish mackerel, enter bays and can be caught near bridges and piers. Common features of mackerel are a slim, cylindrical shape and numerous finlets on the dorsal and ventral sides behind the dorsal and anal fins. The scales are extremely small, if present. The largest species called “mackerel” is the king mackerel which can grow to 66 inches. A female mackerel lays about 1,000,000 eggs at a time.