The Cero mackerel, Scomberomorus regalis, is similar in appearance and coloration to the Atlantic Spanish mackerel, Scomberomorus maculatus except that the Cero has a longitudinal stripe in addition to the spots of the Spanish.

The Cero reaches larger sizes than the Spanish, often 10 lb

Pound (mass)

The pound or pound-mass is a unit of mass used in the Imperial, United States customary and other systems of measurement...

 or more, but those over 30 lb are extremely rare. The first dorsal fin

Dorsal fin

A dorsal fin is a fin located on the backs of various unrelated marine and freshwater vertebrates, including most fishes, marine mammals , and the ichthyosaurs...

 is black anteriorly, the lateral line descends slowly from the shoulder without the sharp break seen on the king mackerel, Scomberomorus cavalla.

In Florida, it is rare north of Palm Beach

Palm Beach, Florida

The Town of Palm Beach is an incorporated town in Palm Beach County, Florida, United States. The Intracoastal Waterway separates it from the neighboring cities of West Palm Beach and Lake Worth...

, common throughout the Florida Keys

Florida Keys

The Florida Keys are a coral archipelago in southeast United States. They begin at the southeastern tip of the Florida peninsula, about south of Miami, and extend in a gentle arc south-southwest and then westward to Key West, the westernmost of the inhabited islands, and on to the uninhabited Dry...

, as it is throughout the West Indies. Fishing methods and prey are similar to those of the Spanish mackerel.