The Blue runner (Caranx crysos) is a fish found along the coastlines of the Atlantic Ocean, mostly in the inland waters of the east coast of North America and the west coast of Africa. The fish has a rounded body shape and can grow to up to 27.56 in (70cm) long and weigh more than 11 lb (5kg). The body is silvery blue in color with a large eye.
Blue runners are known as very fast and aggressive fish, traveling in schools and eating smaller fish and invertebrates. Schools may also pick apart larger prey. Blue runners are considered game fish and their flesh is reportedly good to eat. Other names the Blue runner may be known by are Hardtail, Bluestripe jack, and runner. They are also sometimes confused with the Yellow jack, Caranx bartholomaei.