Swift-moving, slim marine game fish ( Rachycentron canadum ), the only member of the family Rachycentridae.
Found in most warm oceans, this voracious predator may grow as long as 6 ft (1.8 m) and weigh 150 lbs (70 kg) or more. It has a jutting lower jaw, a rather flat head, and light-brown sides, each with two lengthwise, brown stripes. Its distinctive dorsal fin consists of a row of short spines followed by a long, soft-rayed fin.