This pelagic and oceanodromous species occurs in open waters, but always remains close to the shoreline. It is found to 50 m depth. The young may enter bays and harbours. It forms multi-species schools by size with other scombrid species, comprised of 100 to over 5,000 individuals. It is a highly opportunistic predator that feeds indiscriminately on small fishes, especially clupeoids and atherinids (Griffiths et al. 2009). Its maximum fork length is 100 cm. This species spawns extensively, both geographically and temporally, throughout its range (Schaefer 2001). Size at first maturity off Pakistan was 37.7 cm and longevity was about 9 years (Ahmed et al. 2015). A study conducted in Taiwan reported the age at first maturity to be 2 years (Chiou et al. 2004). Longevity has been estimated at 6 years (Landau 1965). When applying an age at first reproduction of 2 years and longevity of 6 years, its estimated generation length is 4 years based on the following equation recommended by the IUCN Red List methods: Age at first reproduction + (Age at last reproduction -“ age at first reproduction)/2.