"The first thing I did was call my buddies at the IGFA (International Game Fish Association) the world record keeping body, and Salt Water Sportsman magazine and asked them what was the biggest fish ever caught and released alive. Figures were in the 2,000 lb range on recreational tackle. I sent them this picture and they said nothing has been caught and released alive that big. We caught three of them over 4,000 lbs., the three biggest fish ever in history, caught and released alive. A specially designed system is used to keep each alive. The exam includes a blood draw by Dr. Domeier to check hormone levels, measurements, sperm samples taken, and tagging by attaching a tracking antenna to the dorsal fin before releasing.