The cero (Scomberomorus regalis), also known as the cero mackerel or painted mackerel, is a ray-finned bony fish in the family Scombridae, better known as the mackerel family. The cero reaches larger sizes than the Atlantic Spanish mackerel, often 10 lb (4.5 kg) or more, but those over 30 lb (14 kg) are extremely rare. The first dorsal fin is black anteriorly, the lateral line descends slowly from the shoulder.It is rare north of Palm Beach, but common throughout the Florida Keys and throughout the West Indies.