Order - Perciformes
Family - Scombridae
Genus - Scomberomorus
Species - regalis
Bloch described the cero mackerel as Scomberomorus regalis in 1793. The genus Scomberomorus is derived
from the Latin word "scomber" = mackerel and the Greek word "moros" = silly, stupid. Regalis is from the
Latin language, meaning royal. Scomberomorus plumierii Lacepede 1803 and Cybium regale Cuvier 1829
are synonyms referring to this species. The family Scombridae includes tunas, mackerels, and bonitos, all swift
predators of tropical and subtropical open seas. They are among the most important of the commercial and sport fishes.
Cero mackerel (English), cero (English), kingfish mackerel (English), carite (Spanish), carite chinigua (Spanish),
carite rey (Spanish), carito (Spanish), caval-branca (Portuguese), königsmakrele (German), makrela krowleska (Polish),
pintada (Spanish), serra-malhada (Portuguese), sierra (Spanish), thazard atlantique (French), thazard franc (French),
and zapadnoatlanticeskaya makrel (Russian).
The range of the cero mackerel is limited to the western Atlantic Ocean, from Massachusetts, USA south to
Brazil, including the Bahamas and West Indies. It is common in the Caribbean, Bahamas, and Florida.
World distribution map for the cero mackerel
Usually solitary, the cero mackerel occasionally forms schools over coral reefs, wrecks, and along ledges at depths
ranging from 3.3-66 feet (1-20 m). It is usually seen in mid-water and near the water's surface.
Importance to Humans
© J. Soward
- ˇ Distinctive Features
The elongate, streamlined body of the cero mackerel is well-adapted for swimming at speeds up to 30 mph (48 kph).
The body is covered with small scales, with the lateral line sloping downwards toward the caudal peduncle. Another similar
fish, the king mackerel, can be distinguished from the cero mackerel as it has a lateral line that curves downward below
the second dorsal fin. The caudal fin is lunate and the pelvic fins are relatively long. Scales extend out onto the
pectoral fins. This characteristic distinguishes it from the king mackerel and the Spanish mackerel, two scombrids
lacking scales on the pectoral fins. The spiny and soft dorsal fins are separate, with the soft dorsal fin matching
the anal fin directly below it. There are a series of finlets following each fin as well as three keels on either side
of the caudal peduncle. The swim bladder is absent in the cero mackerel. Although, the cero is often confused with the
Spanish mackerel, there are three main differences between the two species. Firstly, the cero has an elongate posterior
pelvic process. Secondly, there is a difference in the circulatory system, where the cero has a coeliaco-mesenteric shunt,
and the Spanish mackerel does not. Lastly the cero does not have a pterotic spine.
Distinguishing features of the cero, king mackerel, and spanish mackerel
courtesy National Marine Fisheries Service
- ˇ Coloration
The back is iridescent bluish-green with the sides and belly silvery in color. A mid-lateral bronze stripe runs from
the pectoral fin to the base of the caudal fin. There are several rows of yellow-orange streaks along with yellow
spots forming lines above and below the lateral stripe. The anterior third of the first dorsal fin is bluish-black.
The spot pattern on the sides of the body along with the bluish-black coloration of the anterior dorsal fin and the
scaled pectoral fins all separate this fish from the Spanish mackerel, S. maculatus, and the king mackerel,
S. cavalla. The anterior portion of the dorsal is not black in the king mackerel except in young individuals.
The Spanish mackerel, by contrast, has spots along its sides similar to the cero mackerel, however it lacks longitudinal
stripes as well as the yellow-orange streaking pattern.
- ˇ Dentition
The cero mackerel is well-equipped for prey capture with powerful jaws and razor-sharp teeth.
- ˇSize, Age, and Growth
The cero mackerel grows to a maximum size of 72 inches (183 cm) in length and 17 pounds (7.76 kg) in weight. The record
in Florida waters is 15.5 pounds (7 kg), although the fish commonly weighs up to 8 pounds (3.6 kg). Males reach maturity at
lengths between 12.8-13.4 inches (32.5-34 cm), and females at lengths of approximately 15 inches (38 cm).
- ˇ Food Habits
This swift, shallow water predator feeds primarily on clupeioid fish including herrings as well as silversides of the
genus Allanetta. The diet of the cero mackerel also includes squid and shrimp.
Squid - prey item of the cero mackerel
- ˇ Reproduction
Spawning occurs offshore during April through October off Jamaica, and year round off the coast of Florida,
Puerto Rico, and Venezuela. Females between 15-31 inches (38-80 cm) release from 160,000 to 2.23 million eggs
each. This species has oviparous, buoyant eggs and pelagic larva.The eggs are usually 0.046-.048 inches (1.16-1.22 mm)
in diameter and hatch at 0.013-0.014 inches (0.34-0.36 mm). During development of the larva, the caudal fin appears first,
and is followed by the development of the first dorsal, second dorsal, anal, and lastly the pectoral pelvic fin.
Cero mackerel juveniles: A. 5.98 mm,
B. 7.30 mm, C. 10.74 mm
Mayo (1973) in
Development of Fishes of the
Mid-Atlantic Bight - U.S. Fish and Wildlife Service
- ˇ Predators
Predators of the cero mackerel include wahoo (Acanthocybium solandri), sharks, dolphins, and diving sea birds.
The silvery color of the underside of this fish blends in well with the glow from the sun shining on the surface of the
water, making it difficult to detect for predators threatening from below. On the other hand, the dark coloration of the
cero mackerel's back blends in with the blue-green color of the sea, making it difficult to spot from a bird's view.
- ˇ Parasites
The cero mackerel hosts 21 documented parasites. Among these parasites is the copepod Brachiella thynni, which is
found on the fins of this fish. Other parasitic copepods are Caligus bonito and Caligus productus which
occur on the body surface and on the wall of the branchial cavities, as well as Pseudocycnoides buccata which
occurs as a parasite on the gill filaments.
Other parasites include protozoans, digenea (flukes), didymozoidea (tissue flukes), monogenea (gillworms), cestoda
(tapeworms), nematoda (roundworms), and isopods.
While the cero mackerel is of only minor commercial importance, it is a popular game fish. The cero is caught
commercially with gillnets and on lines throughout the Caribbean, especially in the Bahamas and the West Indies.
Sport fishers often take this mackerel by trolling with cut bait. The cero mackerel is easily confused with the
king mackerel and the Spanish mackerel by fishers. It is a good food fish, marketed fresh, smoked, and frozen and
prepared for consumption pan-fried, broiled, or baked.
Danger to Humans
There have been reports of ciguatera poisoning from human consumption of this fish. Ciguatera poisoning occurs when
humans eat a fish that has eaten a toxin that is produced by the dinoflagellate, Gambierdiscus toxicus.
This poisoning, although it is usually self-limiting, can affect humans in many ways. It has gastrointestinal,
neurological, and cardiovascular symptoms. Although often observed swimming toward scuba divers and snorkelers,
this fish rarely comes very close.
This mackerel is not listed as endangered or vulnerable with the World Conservation Union (IUCN). The IUCN is a
global union of states, governmental agencies, and non-governmental organizations in a partnership that assesses the
conservation status of species.
Tina Perrotta and Cathy Bester