Being popular is great, but being loved comes with itsown set of problems.  Just ask the tunaindustry.  

Tuna never has been morepopular than it is today, with more people eating it in its various forms thanever before. That burgeoning demand, not just from developed nations thatcontinue to want the fish, but from developing countries with growing middleclasses who have a pent-up demand for a better standard of living, is creatingcrisis conditions for some tuna species.  

Overfishing from some licensed fleets, and illegal, unreported andunregulated (IUU) fishing are driving some species to the brink of extinctionand causing others to move toward that status, as are environmentalissues.