Tunas, mackerels, Spanish mackerels, albacore, bonitos, seerfishes and wahoo are the common names for the members of the Scombridae family. The family members are distinguished by having finlets behind dorsal and anal fins, deeply forked caudal fin, and at least 2 small keels on each side of caudal peduncle. Many species have a larger keel in between the small keels.
Members of the Scombridae are found in the tropical and subtropical seas around the world. There are 15 genera and 54 species worldwide. All of them are excellent food fishes. Many are of commercial importance and good sports fishes. Scientifically the family is divided into 2 subfamilies. The subfamily Scombrinae consist of 53 species and Gasterochismatinae consist of only one species. However, in general they can be divided according to their shape into 3 groups; spanish mackerels, mackerels and tunas.
The mackerels are mainly from Rastrelliger (3 species) genus. They are the smaller scombrids where their length rarely exceed 35 cm. They are mostly found near coastal waters. They frequently occur in large schools. They feed mainly on zooplankton. They often swims with their mouth open to strain plankton from the water using their gill rakers.