These Omega-3 fatty acids provide cardiovascular benefits.  They  help to prevent erratic heart rhythms, making blood less likely to clot in arteries (the ultimate cause of most heart attacks), and improving the ratio of good (HDL) cholesterol to potentially harmful (LDL) cholesterol.

Cold-water tuna species, like Southern bluefin tuna, are the richest source of omega-3 essential fats, as well as a very good source of collagen which helps to keep skin looking young and healthy. SAFETY

Australian ranched Southern Bluefin Tuna are generally juvenile fish aged between 2-3 years old and have not had time to bio-accumulate high levels of toxins however industry and government scientists regularly check the levels of mercury, dioxins, PCBs, heavy metals and metalloids, chemical residues, antibiotics and antibacterials, and other general pollutants in both feed and tuna end product.

Australian Industry Standards are more stringent than those of most other nations and as yet none of the levels of pollutants or residues investigated have exceeded the limits set by the Food Standards of Australia and New Zealand, Codex Alimentarius of the FAO and the WHO, the Food and Drug Administration of the United States, and the various regulatory authorities of the European Union.

A study published in 2008 found that mercury distribution in tuna meat is inversely related to the lipid content, suggesting that the lipid concentration within edible tuna tissues has a diluting effect on mercury content. These findings suggest that choosing to consume a type of tuna that has a relatively higher natural fat content may help reduce the amount of mercury intake, compared to consuming tuna with a low fat content.

Many tuna stocks around the world are recognised as being over-fished and poorly managed.  The Regional Fisheries Management Organisations (RFMOs) charged with the management of the fisheries and the distribution of tuna throughout the world are therefore struggling to do their job effectively.

The RFMO in charge of Southern Bluefin Tuna is known as the Commission for the Conservation of Southern bluefin tuna (CCSBT) and they are one of the few success stories.

The CCSBT was originally a tripartite agreement between the nations of Japan, Australia, and New Zealand. The organisation now has the Republic of Korea and Taiwan as full members, as well as the Philippines, South Africa and the European Community listed as collaborating non-members (a status seen as a stepping stone to full membership).  Indonesia is expected to become a collaborating non-member as well.

The CCSBT regulates the numbers of Southern bluefin caught each by allocating quotas to member nations. These quotas are regularly reviewed and revised by the commission. In September 2009, the Australian quota was cut by 25% to further enhance the sustainability of the Southern Bluefin Tuna.

The CCSBT is arguably the most effective tuna RFMO in the world.

As part of the CCSBT, the Australian Southern Bluefin Tuna Fishery uses underwater video cameras to record and count every individual fish that is caught in the Great Australian Bight and transferred into pens in the waters of the Spenser Gulf.

This process, and the numbers of fish allocated to each ranch according to quota, is monitored by the Australian Fisheries Management Authority (AFMA). Compared to other tuna fisheries that often land and distribute Illegal, Unregulated and Unreported (IUU) tuna, the Australian Southern Bluefin Fishery, with fish numbers increasing each year in the Bight, could be said to be the most sustainable tuna fishery in the world.