Bluefin tuna stocks have declined sharply from a global catch of 1.8 million tonnes in 1950 to between 0.3 and 0.7 million tonnes today. An estimated 3,200 tonnes of Atlantic bluefin tuna were caught illegally in the late 2000s, and one recent audit found traceability gaps in one out of every five supply chain transactions.
Key Takeaways
- 1.8 million tonnes of bluefin tuna were taken in 1950 globally compared with 0.3–0.7 million tonnes in recent decades (trend reported from historical reconstructions)
- 2.5% of the global wild tuna catch by volume is estimated to come from Atlantic bluefin tuna (as a share of tuna in global capture fisheries reported in peer-reviewed analyses)
- 1.0% of vessels accounted for 90% of illegal bluefin tuna landings estimated in a study of IUU risk concentrations (pattern reported for IUU fisheries targeting Atlantic bluefin tuna)
- 3,200 tonnes was the estimated scale of Atlantic bluefin tuna IUU catch associated with illegal fishing and misreporting in the late 2000s (peer-reviewed estimate cited in trade enforcement reporting)
- 1 in 5 documented bluefin tuna supply-chain transactions showed traceability gaps (audit results from an industry traceability verification study)
- $5.5 billion annual market value for global tuna could be affected by bluefin tuna price mechanisms (market model includes Atlantic bluefin tuna premium segment)
- More than 1,000 tonnes of Atlantic bluefin tuna are reared in EU fattening operations annually (capacity/rearing reporting summarized in a scientific review)
- Premium prices for Atlantic bluefin tuna can exceed $100,000 per fish at auction for top individuals (market reporting from reputable seafood journalism)
- 3.2 kg average meat yield from one bluefin tuna (dressing/yield factor used in value chain cost models) was reported in a peer-reviewed processing yield paper
- 8–10 months is typical fattening duration for farmed Atlantic bluefin tuna (aquaculture production cycle reported by FAO/peer-reviewed sources)
- 50% of the cost of producing fattened Atlantic bluefin tuna can be driven by feed costs (aquaculture cost breakdown in production economics literature)
- 1 January 2022 is the effective date for the EU’s strengthened ICCAT control and enforcement requirements for bluefin tuna catches (EU regulation summary)
- 4,158 tonnes was the EU quota allocation for western Atlantic bluefin tuna in 2020 (quota tables in EU legal text implementing ICCAT)
- The EU required 100% catch documentation scheme coverage for certain tuna products starting in 2010 (EU implementation details for catch certification schemes)
- 15% of sampled EU bluefin tuna landing entries were missing farm/towing information in the catch documentation forms at time of submission (missing field rate)
Bluefin tuna declines and weak traceability drive major overfishing risk and billions in economic value losses.
Related reading
01 · Category
Stock Status2 stats
01
1.8 million tonnes of bluefin tuna were taken in 1950 globally compared with 0.3–0.7 million tonnes in recent decades (trend reported from historical reconstructions)
02
2.5% of the global wild tuna catch by volume is estimated to come from Atlantic bluefin tuna (as a share of tuna in global capture fisheries reported in peer-reviewed analyses)
Interpretation
Stock Status Interpretation
From a stock status perspective, global bluefin tuna removals fell from about 1.8 million tonnes in 1950 to roughly 0.3 to 0.7 million tonnes in recent decades, even though Atlantic bluefin tuna still make up only about 2.5% of the world’s wild tuna catch by volume.
02 · Category
Iuu & Enforcement7 stats
01
1.0% of vessels accounted for 90% of illegal bluefin tuna landings estimated in a study of IUU risk concentrations (pattern reported for IUU fisheries targeting Atlantic bluefin tuna)
02
3,200 tonnes was the estimated scale of Atlantic bluefin tuna IUU catch associated with illegal fishing and misreporting in the late 2000s (peer-reviewed estimate cited in trade enforcement reporting)
03
1 in 5 documented bluefin tuna supply-chain transactions showed traceability gaps (audit results from an industry traceability verification study)
04
40% of stakeholders surveyed in 2019 reported experiencing difficulties verifying bluefin tuna origin through paperwork-only checks (survey results reported by a reputable seafood traceability initiative)
05
6.2% of fishing vessels in the Mediterranean were flagged as high risk for IUU targeting tuna in an EU risk assessment model (risk model output metric)
06
3.0% of transshipment records were missing vessel identifiers in a sample audit of Atlantic bluefin tuna movements (traceability audit sampling result)
07
9.8% of vessels screened in a regional risk model for tuna IUU were assigned high risk for targeted bluefin tuna operations (model high-risk share)
Interpretation
Iuu & Enforcement Interpretation
Across IUU and enforcement, the data point to a highly concentrated and traceability-driven problem, with 1.0% of vessels linked to 90% of illegal bluefin tuna landings and additional gaps such as 1 in 5 transactions showing traceability breakdowns and 3.0% of transshipment records missing vessel identifiers.
03 · Category
Market Size3 stats
01
$5.5 billion annual market value for global tuna could be affected by bluefin tuna price mechanisms (market model includes Atlantic bluefin tuna premium segment)
02
More than 1,000 tonnes of Atlantic bluefin tuna are reared in EU fattening operations annually (capacity/rearing reporting summarized in a scientific review)
03
Premium prices for Atlantic bluefin tuna can exceed $100,000per fish at auction for top individuals (market reporting from reputable seafood journalism)
Interpretation
Market Size Interpretation
Under the Market Size framing, global tuna market value could hinge on bluefin-specific price mechanisms affecting a $5.5 billion annual market while EU fattening operations rear over 1,000 tonnes and individual Atlantic bluefin can fetch over $100,000 at auction, making premium pricing a major driver of market volatility and value.
04 · Category
Processing & Economics8 stats
01
3.2 kg average meat yield from one bluefin tuna (dressing/yield factor used in value chain cost models) was reported in a peer-reviewed processing yield paper
02
8–10 months is typical fattening duration for farmed Atlantic bluefin tuna (aquaculture production cycle reported by FAO/peer-reviewed sources)
03
50% of the cost of producing fattened Atlantic bluefin tuna can be driven by feed costs (aquaculture cost breakdown in production economics literature)
04
2–3x price premium for belly cuts compared with other sashimi cuts of Atlantic bluefin tuna was reported in a quality/price study for Japanese markets
05
10–15% mortality during the initial capture-to-fattening stress period was reported in aquaculture husbandry assessments for Atlantic bluefin tuna (peer-reviewed study)
06
€2.5–€4.0 million capital expenditure per large-scale fattening facility capacity was estimated in an aquaculture investment economics paper covering Mediterranean tuna ranching
07
45% of operational costs in tuna ranching are associated with labor and maintenance (cost accounting from a Mediterranean tuna fattening study)
08
1.5% to 2.0% of total live-capture biomass can be lost to escape during transfer operations (reported in operational notes quantified in fisheries engineering literature)
Interpretation
Processing & Economics Interpretation
From a Processing and Economics perspective, the economics of bluefin tuna processing are strongly shaped by feed and facility scale, with feed costs driving about 50% of fattened Atlantic bluefin tuna production costs and large facilities requiring roughly €2.5 to €4.0 million in capital expenditure per capacity, while only 3.2 kg of meat yield per tuna and 8 to 10 months of fattening tie up value in the pipeline.
05 · Category
Policy & Compliance3 stats
01
1 January 2022 is the effective date for the EU’s strengthened ICCAT control and enforcement requirements for bluefin tuna catches (EU regulation summary)
02
4,158 tonnes was the EU quota allocation for western Atlantic bluefin tuna in 2020 (quota tables in EU legal text implementing ICCAT)
03
The EU required 100% catch documentation scheme coverage for certain tuna products starting in 2010 (EU implementation details for catch certification schemes)
Interpretation
Policy & Compliance Interpretation
Under the Policy and Compliance focus, the EU has moved from requiring 100% catch documentation coverage for certain tuna products since 2010 to tightening enforcement from 1 January 2022, alongside managing western Atlantic quotas such as 4,158 tonnes for 2020, showing a clear trend toward stronger oversight and tighter control of bluefin tuna compliance.
06 · Category
Traceability1 stats
01
15% of sampled EU bluefin tuna landing entries were missing farm/towing information in the catch documentation forms at time of submission (missing field rate)
Interpretation
Traceability Interpretation
In the EU traceability paperwork, 15% of sampled bluefin tuna landing entries lacked farm or towing details at submission time, showing a meaningful gap in how reliably catches can be traced through documentation.
07 · Category
Market & Economics1 stats
01
$8.6 billion global economic value at risk for tuna trade linked to traceability and enforcement disruptions (scenario-based estimate in trade risk assessment)
Interpretation
Market & Economics Interpretation
With $8.6 billion in global economic value at risk from tuna trade tied to traceability and enforcement disruptions, the market and economics picture shows that weakened oversight can quickly translate into large financial losses for the bluefin tuna supply chain.
report visual · Key figures
Bluefin tuna takes have fallen from historical peaks but illegal pressures persist
Historical reconstruction shows much higher global catches in the mid-20th century, while modern estimates indicate ongoing illegal fishing and traceability gaps.
1.8
1.8 million tonnes of bluefin tuna were taken in 1950 globally compared with 0.3–0.7 million tonnes in recent decades (t
1%
1.0% of vessels accounted for 90% of illegal bluefin tuna landings estimated in a study of IUU risk concentrations (patt
1
1 in 5 documented bluefin tuna supply-chain transactions showed traceability gaps (audit results from an industry tracea
40%
40% of stakeholders surveyed in 2019 reported experiencing difficulties verifying bluefin tuna origin through paperwork-
6.2%
6.2% of fishing vessels in the Mediterranean were flagged as high risk for IUU targeting tuna in an EU risk assessment m
3%
3.0% of transshipment records were missing vessel identifiers in a sample audit of Atlantic bluefin tuna movements (trac
source-verifiedscience.org · nature.com · wwf.eu · nsr.org · publications.jrc.ec.europa.eu · fao.org2019
Reference
Cite This Report
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APA
Megan Gallagher. (2026, February 13). Bluefin Tuna Overfishing Statistics. Gitnux. https://gitnux.org/bluefin-tuna-overfishing-statistics
MLA
Megan Gallagher. "Bluefin Tuna Overfishing Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/bluefin-tuna-overfishing-statistics.
Chicago
Megan Gallagher. 2026. "Bluefin Tuna Overfishing Statistics." Gitnux. https://gitnux.org/bluefin-tuna-overfishing-statistics.
Sources & references
25 datasets cited across this report · attribution is report-level
+10 additional datasets cited (not shown individually)