The Australian Marine Conservation Society (MCS) has ranked the country's tuna brands according to sustainability criteria, grading them on a red, amber, or green scale, the Guardian reported.

The assessment identified Safcol's "No Net Tuna" as the sole "green" option among Australia's canned tuna brands. In contrast, most popular products were claimed to be unsustainable due to fishing practices that the NGO said harm marine ecosystems.

Several brands were marked as unsustainable for using purse seine nets, with MCS claiming this fishing method poses risks to marine life like manta rays.

Safcol's No Net Tuna exclusively employs pole-and-line fishing, minimizing bycatch, according to MCS. Other brands, including Sirena Tuna and retailer Aldi's Ocean Rise, received mixed ratings due to sourcing from both healthy and overfished populations, notably yellowfin tuna from the Indian Ocean.

Adrian Meder of the society noted improvements but highlighted ongoing issues with labeling and fishing methods. MCS advocates for clearer labeling and will address labor abuses and illegal fishing in its 2025 review.