Blue marlin

Blue marlin may refer to:

• Atlantic blue marlin, Makaira nigricans, species of large fish
• Indo-Pacific blue marlin, Makaira mazara, whether or not it is a separate species from Makaira nigricans is currently debated
• MV Blue Marlin, a heavy transport ship
• The Blue Marlin, a 1991 fishing video game for the Nintendo Entertainment System