In a recent bluefin tuna recapture reported to TBF, a bluefin tuna tagged off Cape Cod in June of 2008 migrated across the Atlantic and grew an estimated 300 lbs. during the six years it was at large. This bluefin, BF424961 was also released off the Atlantic coast of the US and recaptured closet to 4,800 miles away in the Mediterranean. When it was tagged and released by Captain Ken Weil in July of 2007 they estimated it weighed around 80 lbs. After seven years at large the fish weighed 616 lbs when harvested in June of 2014, displaying a growth rate of closet to 80 lbs. Growth rates and the mixing of western and eastern Atlantic bluefin is a high priority research topic and this information will certainly aid in better managing bluefin.
Check out some of the recaptures tracks from some of TBF tagged fish.