For more information abut this rating, please visit: https://www.cornwallgoodseafoodguide.org.uk/fish-guide/atlantic-bluefin-tuna.php

For more information abut this rating, please visit: https://www.cornwallgoodseafoodguide.org.uk/fish-guide/atlantic-bluefin-tuna.php

For more information abut this rating, please visit: https://www.cornwallgoodseafoodguide.org.uk/fish-guide/atlantic-bluefin-tuna.php

For more information abut this rating, please visit: https://www.cornwallgoodseafoodguide.org.uk/fish-guide/atlantic-bluefin-tuna.php

Atlantic bluefin tuna in the east Atlantic and Mediterranean is recovering from historically low levels. Management has been effective at supporting stock recovery. However, there remains a lot of uncertainty about whether the stock has reached sustainable levels yet. Additionally, some illegal fishing is taking place. Most east Atlantic bluefin tuna is caught by purse seining. This method can be associated with bycatch of species such as sharks, turtles and marine mammals. However, bluefin purse seining is more targeted than other tuna fisheries, reducing bycatch risk to an extent.Rating last updated January 2023.

Atlantic bluefin tuna in the east Atlantic and Mediterranean is recovering from historically low levels. Management has been effective at supporting stock recovery. However, there remains a lot of uncertainty about whether the stock has reached sustainable levels yet. Additionally, some illegal fishing is taking place. Some eastern Atlantic bluefin catches are by fixed traps, also known as 'almadraba'. These traps have low levels of bycatch, and are unlikely to have significant habitat impacts.Rating last updated January 2023.

Atlantic bluefin tuna in the east Atlantic and Mediterranean is recovering from historically low levels. Management has been effective at supporting stock recovery. However, there remains a lot of uncertainty about whether the stock has reached sustainable levels yet. Additionally, some illegal fishing is taking place. Some east Atlantic bluefin tuna are caught by surface fisheries such as handline and pole & line. These are generally low-impact methods.Rating last updated January 2023.

Atlantic bluefin tuna in the east Atlantic and Mediterranean is recovering from historically low levels. Management has been effective at supporting stock recovery. However, there remains a lot of uncertainty about whether the stock has reached sustainable levels yet. Additionally, some illegal fishing is taking place. Some east Atlantic bluefin tuna are caught by longlining. While longlining is unlikely to have habitat impacts, it can have a bycatch of highly vulnerable species such as sharks, turtles, and seabirds.Rating last updated January 2023

Farming or ranching of Bluefin tuna relies on capture of juvenile wild tunas for on-growing and fattening in open net cages until harvest. Therefore this process is completely reliant on wild fish stocks. There is still concern for the biomass of the stock as the stock is still recovering from very low levels and there is a lack of reference points. Farming in this way will not lessen the pressure on the species. In the case of Mediterranean sea ranching operations, the capture of tuna for ongrowing is an increasing part of the catch. The ranching of tuna requires large amounts of fresh fish for feeding, with an average of 20 kg of wild fish required to produce 1 kg of Bluefin. There are currently no known procedures in place to ensure animal welfare and humane slaughter. Tuna resulting in a significant net loss of fish protein. Management and regulation of ranched tuna in the Mediterranean is only partially effective in mitigating the negative environmental impacts from aquaculture. However, it does seem that farming is incorporated in marine spatial planning.Rating last updated January 2025.