Tuna are among the world’s most popular fish and therefore among the most commercially valuable. Fished in more than 70 countries, tuna are marketed in fresh, smoked, iced and canned.
A tuna is a saltwater fish that belongs to the tribe Thunnini, a subgrouping of the Scombridae family. The Thunnini comprise 15 species across five genera, the sizes of which vary greatly, ranging from the bullet tuna up to the Atlantic bluefin tuna. The bluefin averages 2 m, and is believed to live up to 50 years.