The most common Australian seafood myths — and what the evidence actually shows.
14 myths debunked across 4 categories.
Myth: All fish has dangerous levels of mercury.
Fact: Most popular Australian seafood — salmon, prawns, oysters, barramundi, sardines, whiting — is low or very low in mercury. FSANZ flags only a handful of long-lived predators (shark, ray, swordfish, billfish) for limited intake during pregnancy.FSANZ mercury in fish guidance
Myth: Farmed salmon is full of antibiotics.
Fact: In Tasmania, salmon antibiotic use is governed by Veterinary Health Plans and prophylactic dosing is banned. Detection in retail product is rare under FSANZ residue testing.FSANZ antibiotic residues in imported seafoodTasmanian salmon industry figures
Myth: Frozen seafood is always lower quality.
Fact: For most species (especially prawns and tuna), commercial blast-freezing within hours of catch preserves quality far better than 'fresh' product that spent a week in the cold chain. The issue is freshness chain, not freezing per se. Most Australian-caught prawns are snap-frozen at sea; most imported product is also frozen, but the cold-chain integrity from boat to retail is variable.Country of Origin — supply-chain timeline modelDAFF Imported Food Inspection Scheme
Myth: You shouldn't eat seafood more than once a week.
Fact: The Heart Foundation, NHMRC and WHO all recommend at least 2–3 servings of fish per week for omega-3 intake.Heart Foundation omega-3 guidanceNHMRC Australian Dietary Guidelines
Myth: Australian fisheries are over-fished.
Fact: The biennial SAFS report finds the great majority of Australian stocks are 'sustainable' or 'recovering' — Australia is among the world's best-managed fishing nations.SAFS 2024
Myth: All farmed shrimp is bad for mangroves.
Fact: Historically, large-scale shrimp pond expansion in SE Asia caused mangrove loss. Current best practice uses already-cleared land and certified standards (BAP, ASC). Mangrove-conversion remains a real but reduced concern.FAO mangrove assessmentWWF shrimp aquaculture
Myth: Tasmanian salmon is ASC-certified, so there's nothing to worry about.
Fact: Certification helps but doesn't eliminate concerns about Macquarie Harbour oxygen levels, marine debris and sea-lice. Public scrutiny in TAS is genuine and ongoing.Guardian Tasmanian salmon reporting
Myth: Tuna is always over-fished.
Fact: Southern Bluefin Tuna was severely depleted but has been classified 'recovering' under CCSBT since 2014. Yellowfin and skipjack stocks vary by ocean and fleet.SAFS 2024AFMA Commonwealth harvest strategies
Myth: Australia barely fishes — most seafood is imported.
Fact: Both are true: Australia produces $3B GVP, and 66% of seafood eaten here is imported. The local industry is significant but consumption is far higher than production.FRDC economic contributionImported share of AU seafood
Myth: Indigenous fishing means just customary catch.
Fact: Native title now supports commercial Indigenous fisheries (Akiba 2013). Indigenous-owned operators contribute $50M+ annually and manage huge tracts of Sea Country.Akiba v CommonwealthNAILSMA saltwater country
Myth: Aquaculture and wild-catch are at war.
Fact: They are complementary segments — aquaculture provides reliable year-round volume (salmon, oysters, barra, mussels, prawns), wild-catch provides species and seasonality you can't farm (rock lobster, snapper, abalone, mud crab). Both contribute to the $3B Australian seafood GVP and have grown in parallel over the last decade.FRDC economic contributionABARES fisheries statistics
Myth: 'Made in Australia' means the seafood is Australian.
Fact: It only means the product was processed here. The seafood itself can be 100% imported. Look for 'Product of Australia' for the strongest claim.Dept Industry CoO labelling hubCountry-of-origin (seafood) Info Standard 2025
Myth: Restaurants already have to disclose seafood origin.
Fact: Not until 1 July 2026. The Cool-Fi standard then requires fishmongers, takeaways, restaurants and clubs to display origin (Australian / Imported / Mixed) for cooked seafood.Country-of-origin retail food labelling
Myth: If it says 'snapper' in a fish & chip shop, it's snapper.
Fact: Multiple DNA studies have shown 'snapper' is one of the most-mislabelled categories. Genuine snapper is protected under AFNS — but only if the seller uses the correct name.AMCS / Minderoo DNA fish-IDAustralian Fish Names Standard