A series of photos posted to Facebook appear to show the gigantic fish sinking the boat as it is reeled aboard.
However, according to Marlin Magazine, which obtained the pictures, the boat's unfortunate demise was actually caused by human error.
The captain had apparently been "backing down" on the fish, a practice in which the boat is put in reverse to help reel in line.
Unfortunately, turbulence caused him to lose his footing and accidentally hit the throttle into full reverse, causing the boat to lurch backwards and take on water.
Black marlin are reportedly one of the most difficult fish to catch, weighing up to 2,000 pounds and traveling at speeds of up to 80 miles per hour.
Fortunately, no one on the boat was harmed during the incident, although the same cannot be said for the boat itself, which sank to the bottom of the ocean.
The marlin was last seen skipping merrily across the waves.