The Atlantic blue marlin (Makaira nigricans) is a species of Marlin. It is a large commercial game fish with a maximum published weight of 820 kg (1,800 lb) and a maximum total length of 5 m (16 ft 3 in). Its massive size makes it one of the largest bony fish species in the world. Its body is blue-black above, and a silvery white below.

Atlantic blue marlins primarily feed on other fish and Cephalopads.

The Atlantic Blue Marlin is often caught in Tenerife and around the Canary Islands. These days, most of the Blue Marlin caught are tagged and returned to the sea to live longer and grow bigger! Many of the Commercial Game Fishing Charter boats are members of the Blue Marlin Catch, Tag & Release scheme.