On the photo Alfred Glassell poses with his long standing world record Black Marlin (Makaira indica) weighing 1,560 pounds (707.6 kg) caught off Cabo Blanco Peru in 1953. There are a lot of claims for world record, but the largest fish that I found is on the picture above.
Another large black marlin taken in 2001 on the Great Barrier Reef. This massive fish weighed 1,386 lbs (628.7 kg).
Source: Antique & Classic Fishing Reels, BigMarineFish