n.
Any of four species (genus Makaira , family Istiophoridae) of deep-blue to blue-green marine fish with a long body, a long dorsal fin, a rounded spear extending from the snout (which it uses to club the fish it feeds on), and usually pale vertical stripes.
They are highly prized for sport and food. Species range in weight from about 100 lbs (45 kg) to more than 1,500 lbs (700 kg). The Indo-Pacific black marlin ( M. nigicans ) has a distinctive, stiff pectoral fin set at an angle.