All speciesRecovery story

Southern Bluefin Tuna

Once depleted, now rebuilding under the world's most rigorous international quota. Wild-caught in the Great Australian Bight and ranched in Port Lincoln.

Thunnus maccoyii
Flavour: Deep, beefy, melting fat — the world's premium sashimi tuna
Rebuilding· SAFS 2024
Southern Bluefin Tuna (Thunnus maccoyii)

Four reasons to choose local

Health

  • Lower mercury — ranched fish are juveniles fed clean sardines
  • Rich in omega-3 and selenium
  • Tight food-safety surveillance via FSANZ

Economy

  • Port Lincoln industry is SA's largest export contributor
  • Tunarama Festival — cultural anchor of the region
  • Premium export prices (Japan) fund local infrastructure

Environment

  • CCSBT international quota — among the world's most rigorous
  • Stock formally classified as recovering
  • Ranching uses no industrial feed pellets — only sardines

Taste

  • Global gold standard for sashimi-grade tuna
  • Belly (otoro) is a rare delicacy
  • Ranched fattening period produces unmatched marbling

Sourcing

Southern Bluefin Tuna is exclusively wild-caught.

Where it comes from

Southern Bluefin Tuna is most strongly associated with these 3 Australian regions:

How it's caught or grown

Production volume (last 5 years)

Total Australian annual production of Southern Bluefin Tuna — wild-catch + aquaculture combined. Sourced from ABARES Australian Fisheries and Aquaculture Statistics.

Production volume (tonnes)Source: ABARES
20196,00020206,10020216,20020226,40020236,400
primary estimate

How it's managed

Quota:6,238t

CCSBT (Commission for the Conservation of Southern Bluefin Tuna) sets annual global quota; Australia receives ~45%.

Nutrition (per 100g)

How Southern Bluefin Tuna compares to imported equivalents on the headline nutrients consumers care about.

Omega-3 Fatty Acids1800mg1200mg
Protein25.4g23.6g
Vitamin D6.8µg4.3µg
Selenium90µg70µg
Vitamin B129.4µg7.1µg

Contaminants & price

Australian Southern Bluefin Tuna compared to imported equivalents on mercury, antibiotic residues, and typical retail price. Unflagged metrics come from primary government sources (FSANZ, ABARES); synthesised numbers carry a visible tag.

Metric
Australian
Imported
Mercury (mg/kg)
0.38
0.35
Antibiotic residues
none
rare
Typical retail price (2026 Q1)editorial
$45–120/kg
$25–80/kg

From harvest to plate

Days-to-plate is one of the strongest arguments for buying Australian. Here's the typical timeline for Southern Bluefin Tuna.

  1. Step 1
    Catch / ranching harvest
    Day 0 days
  2. Step 2
    Individual processing & grading
    0 days
  3. Step 3
    Air freight (sashimi-grade)
    1–2 days
  4. Step 4
    Retail / restaurant
    2–4 days
  5. Total
    Total AUS sashimi days to plate
    2–4 days

Seasonality

When to enjoy Southern Bluefin Tuna at its peak.

Janpeak
Febpeak
Margood
Aprgood
Maygood
Junavailable
Julavailable
Augavailable
Sepavailable
Octavailable
Novgood
Decpeak
Peak Good Available Off-season

How to cook it

Four go-to preparations for Southern Bluefin Tuna that respect the fish — short cooks, clean flavours, no over-doing it.

Sashimi

Slice akami (lean) thin against the grain. Soy + wasabi only.

Sear (tataki)

Crust with sesame, sear 30 sec each side, slice and dress with ponzu.

Tartare

Hand-dice, dress with shallot, capers, lemon, olive oil.

Ceviche

Cube, marinate in lime + chilli + coriander 5 min before serving.

Full recipe: Southern Bluefin Tuna Tataki

Australian vs imported — at a glance

Wild & ranched Southern Bluefin from the Bight vs imported Yellowfin and Bigeye from various Pacific and Indian Ocean fleets.

Australia
Southern Bluefin Tuna
Southern Ocean
🇦🇺 Local
Omega-3 (per 100g)1,800mg
Mercury LevelLow-Moderate
Quota ManagementCCSBT regulated
Fishing MethodPole & line / ranching
Bycatch RateVery Low
Product TraceabilityVessel to plate
Price per 100g~$6.00
Overall rating: Australian tuna scores 8.7/10 — world-leading quota management ensures stock health.
vs
Various
Imported Tuna
Pacific / Indian Ocean
Omega-3 (per 100g)1,200mg
Mercury LevelModerate-High
Quota ManagementVariable
Fishing MethodOften long-line
Bycatch RateOften High
Product TraceabilityLimited
Price per 100g~$2.80
Overall rating: Imported tuna scores 5.5/10 — sustainability and mercury levels are major concerns.

Read the full comparison →

Look-alikes & how to tell them apart

Products often confused with or substituted for Australian Southern Bluefin Tuna — and what to look for instead.

Imported Yellowfin Tuna
Why confused: Also sold as sashimi-grade at similar price.
How to tell: Bluefin has a deeper ruby-red flesh and higher marbling. Labels must state species and origin.
Tinned tuna (generic)
Why confused: Marketing as 'tuna' without species.
How to tell: Tinned product is almost always imported Skipjack or Yellowfin. Australian bluefin is not canned.

The risks of the imported version

Typically imported from: Pacific Ocean, Indian Ocean (Yellowfin / Bigeye)

  • Mercury accumulation in older, larger imported tuna
  • Long-line bycatch — turtles, sharks, seabirds
  • Seafood mislabelling rates highest for tuna products
  • Traceability often lost at multiple supply-chain handoffs

See the full case against imported seafood →

How to buy it

🔍
Look for:

Specify "Southern Bluefin Tuna" or "Yellowfin Tuna" — origin, species, and grade matter for sashimi.

From 1 July 2026, every restaurant menu in Australia must show A (Australian), I (Imported), or M (Mixed) for each seafood dish. Read the law →

Key operators, co-ops & peak bodies

The businesses, co-operatives, and industry bodies behind Australian Southern Bluefin Tuna.

Historical timeline

  1. 1952
    Commercial Southern Bluefin Tuna fishing begins in South Australia.
  2. 1984
    Historic stock lows trigger international concern.
  3. 1994
    CCSBT formed between Australia, Japan, New Zealand to manage the shared stock.
  4. 1996
    Australian tuna ranching commences in Port Lincoln.
  5. 2022
    Southern Bluefin stock assessed as rebuilding to healthy levels for the first time in decades.

In the news

Sources for this page

  1. SAFS 2024 Fisheries Research and Development Corporation (2024)
  2. FSANZ mercury in fish guidance Food Standards Australia New Zealand (2024)
  3. Oceana global mislabelling meta-analysis Oceana (2021)

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