Cero Mackerel

The cero (Scomberomorus regalis) is a slender, fast-swimming mackerel in the family Scombridae, found in the western Atlantic from Massachusetts through the Gulf of Mexico, Caribbean, and south to Brazil. It is closely associated with reef edges and clear coastal waters more than its relatives the king and Spanish mackerel, which prefer more open or turbid water. Cero are active predators that pursue small schooling fish near the surface. The species supports recreational fisheries throughout its range and is currently considered stable, though it is less abundant and less studied than related Scomberomorus species.

Cero can be distinguished from similar Atlantic mackerels by its distinctive markings.

• Body: elongate and laterally compressed, typical mackerel torpedo shape
• Color: steel-blue back, silvery sides
• Markings: a continuous bronze-yellow stripe runs along the midline, with rows of yellow-orange spots above and below it
• Fins: long, low first dorsal fin, deeply forked tail
• Lateral line: gently curves downward near the tail

Cero is distinguished from the Spanish mackerel by its continuous bronze stripe plus spots, and from the king mackerel by its smaller size and spotted, striped pattern.

Cero inhabit warm coastal and reef-associated waters of the western Atlantic, ranging from the northeastern United States through the Gulf of Mexico, Caribbean Sea, and along the coast of South America to Brazil. They favor clear water near coral reefs, drop-offs, and shoals, typically in the upper water column from the surface to about 45 m. Unlike some relatives, cero rarely enter turbid estuarine waters, staying closer to clear, reef-influenced habitats where visibility supports their sight-hunting feeding style.

Cero are fast, active predators that often hunt alone or in small loose groups near reef edges and drop-offs, targeting small schooling baitfish such as anchovies and silversides. They rely on speed and keen eyesight to chase down prey in clear water. Spawning takes place offshore during warmer months, with females releasing pelagic eggs that drift with currents until hatching. As mid-level predators, cero help control populations of small forage fish while themselves serving as prey for larger pelagic predators such as bigger mackerels, sharks, and marine mammals.