"BREEDING the southern bluefin tuna in captivity has long been considered the holy grail for the Australian tuna industry.
The tuna has almost been wiped out by overfishing, and a sustainable fishery seemed little more than an ambitious dream. But this week at a South Australian hatchery, a young fish of 25 centimetres reached a milestone birthday: 100 days, more than five times what captive breeders have been able to achieve previously.
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