Q: On June 26, 2007 I caught a nice black marlin and boated the fish to have it weighed. Unfortunately, when we hung the fish back at the dock, the fish broke the scale. I didn't get any measurements, but after it was cleaned, the flesh weighed 444 pounds. We see a lot of blues in the same size range as this fish, but this is the first black that I ever caught, and I have no experience with estimating their weights. I've been told that you normally get 60 percent of a blue marlin's weight in flesh when you clean them? Is this a true estimate?