For those not familiar with the concept of IUU, the explosion of so-called tuna ranching in the Mediterranean in the early 2000s provides a good example. In this case, large numbers of bluefin tuna were captured by net — often during or after spawning events — but, rather than being landed and accounted for, were transported to floating cage operations. The premise was to keep them in captivity and feed them, which would not only increase their overall weight but also the condition of their flesh, fetching commercial anglers more money per fish. The problem was that many of these tuna caught for ranching operations went unreported. This resulted in a shell game that made it very difficult for fisheries managers to calculate total landings. The problem got so bad that reported landings were exceeded by as much as 19,400 tons in 2006 and 28,600 tons in 2007.