Southern bluefin tuna raised kilometers out to sea have been found to be healthier with better survival rates.
The world’s first commercial scale trial of off-shore fish development consisted of 15 measurements of health, stress and condition. Among these, it was found the tuna raised in deeper waters gained weight twice as fast and had half as many parasites as those bred in typical near-shore farming pens. This demonstrated superior health overall.
The findings are good news for the worldwide interest in moving aqua farming off-shore, with which there was previously a question of economic viability.