[3] The fishery employs the technique of purse seining, which contributes to the sardines' status as sustainable.

[4][5] Schools of sardines are encircled by a net up to 1 kilometre in length which is then drawn closed at the bottom.

The catch is then pumped on board the fishing vessel where it is stored in refrigerated holds at below freezing temperatures.

94% of the catch is used as feed in Southern bluefin tuna ranching operations off Port Lincoln, South Australia.

[6][7] The remaining 6% of the catch serves human consumption, recreational fishing bait and premium pet food markets.