How many bluefin tuna are left? The population of bluefin tuna is estimated to be around 1.6 million, which is considered sufficient to avoid the risk of extinction and protect against the effects of small populations.

Although Pacific-wide populations are well below target levels, U.S. wild-caught Pacific bluefin tuna is a smart seafood choice because it is sustainably managed under rebuilding measures that limit harvest by U.S. fishermen.

Visual chart //Timeline of the milestones in the recent history of the recovery of the eastern stock of Atlantic bluefin tuna, updated until 2023. In the mid-1970s, scientists started to see that the breeding population of Atlantic bluefin tuna was declining yearly.

The Atlantic bluefin tuna (Thunnus thynnus) is a species of tuna in the family Scombridae. It is variously known as the northern bluefin tuna (mainly when including Pacific bluefin as a subspecies), giant bluefin tuna (for individuals exceeding 150 kg [330 lb]), and formerly as the tunny.

We assembled age-structured stock assessments with >15 y of data for 17 tuna populations (7 species), 5 mackerel populations (2 species), and 4 Spanish mackerel populations (2 species) of the 51 species of scombrids.