More than seven million metric tons of tuna and tuna-like species are harvested yearly, of which 33.3 per cent are fished at biologically unsustainable levels. Tuna account for 20 per cent of the value of all marine fisheries caught and over eight per cent of all seafood traded globally.

The recovery of Pacific bluefin tuna has achieved a major milestone—the species exceeded international targets a decade ahead of schedule. The rebuilding of Pacific bluefin tuna reflects a fisheries management success.

Consumers can find sustainably harvested tuna, but over 50 percent of the most popular kinds of tuna caught globally are considered unsustainable by Seafood Watch standards — so it′s important to know what to buy and what to avoid.

Find out which tuna is sustainable and where to buy sustainable tuna. What is tuna? Tuna is a meaty fish. It belongs to a subgroup of the mackerel family, consisting of 8 species varying in colour and size. Tuna is a nomadic species and can be found throughout the world’s ocean. Tuna can be eaten fresh or canned.