Over the past several years, the IGFA Great Marlin Race has documented some incredible blue marlin movements using satellite tags. This partnership between the IGFA and Stanford University pairs recreational anglers with cutting-edge satellite-tagging technology to gain more insight into the ecology and migratory behavior of billfish. During an IGMR tagging event that took place in San Juan, Puerto Rico, in 2011, a blue marlin traveled an amazing 4,776 nautical miles before the tag popped off near the coast of West Africa — and that’s just the linear distance from the point from where the tag was deployed to where the tag popped off. The actual track was much longer, but what’s most incredible is that the fish traveled that distance in a mere 120 days. Another IGMR-tagged blue marlin traveled from the western Indian Ocean around the Cape of Good Hope into the Atlantic.