Blue mackerel are often mistaken for chub mackerel. It was originally thought to be a subspecies of the chub mackerel "Scomber japonicus colias". The ideal method for catching chub mackerel is round-haul gear such as purse seines. This species of mackerel closely resembles the Atlantic chub mackerel. As juveniles, chub mackerel feed mainly on zooplankton. Chub mackerel are widespread in the Indo-Pacific. Chub mackerel migrate long distances in oceans and across the Mediterranean. Other commonly used fish include Alaska pollock, chub mackerel, sailfin sandfish, and Japanese anchovy. The chub mackerel relies on camouflaging itself to stay hidden from its predators. "G. golvani" was found parasitizing the Atlantic chub mackerel ("Scomber colias"). Sardines, chub mackerel, and bonito are also common catches, but not as prominent, in Peru. Chub mackerel are caught all year round, but especially between June and November. Chub mackerel, "Scomber japonicus", are the most intensively fished scombroid mackerel. Chub mackerel larvae can consume up to 87% of their dry body weight a day. The chub mackerel is widely distributed, usually found in the northwestern, southeastern, and northeastern Pacific.