Exporting tuna by-catch species to Europe

Tuna is the most consumed fish species in Europe, but the by-catch species of tuna fisheries, such as swordfish, Patagonian toothfish, mahi mahi and butterfish, have a strong market presence and growing popularity in certain niches and countries. There is less data available on these by-catch species than on tuna, so they have more specific market requirements, routes to market and product forms than other fish. Still, due to their unique qualities, these species are hard to substitute.