Authorities said on Monday that they had found 2.3 tonnes of cocaine in a wrecked yacht off the coast of Queensland.
The crew of the ship and other individuals waiting on the shore to pick up the illicit shipment were among the eleven men and two minors who were taken into custody.
It was the biggest cocaine bust in Australian history, with an estimated street worth of A$760 million ($490 million; £388 million) and the ability to be divided across 11.7 million distinct street deals.
One of the individuals detained on Saturday night, according to the Australian Federal Police (AFP), was the vice-president of the Brisbane chapter of the Comanchero Outlaw Motorcycle Club.
In Australia, biker gangs are infamous for their drug-related violence; since the 1980s, there have been over 1,000 shootings.
