Blue Runners also known as hardtails are a schooling fish usually found not far from the coast. Their schools can reach up to 10,000 individuals. These fish are powerful swimmers characterized by their streamlined, aerodynamic shape, with latterly compressed body, slender tail base and deeply forked tailfins.
They can be found from the Western Atlantic and from Brazil to Canada. They inhabit both inshore and offshore and are found predominantly over reefs or around large manmade offshore structures like buoys, oil platforms and shipwrecks. Juvenile blue runners have been known to form schools offshore associated with floating objects, and have even been observed living inside the bell of jellyfish.
Blue runners are voracious eaters; they are a schooling predatory fish attacking small schools of fish, shrimp, squid and other invertebrates.
Blue runners spawn offshore from January through August. On average a female can release anywhere from 40,000-1.5 million eggs.
They are preyed upon by many larger species including fishes, birds and dolphins. They are also a targeted game fish and are often used as live bait for big game fish.