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Author: Lynne Mandel

Data Synergy & Market Value: Collaboration, Membership & VOSI Updates | How SFP, GFW & ISSF are advancing tuna transparency — and why ISSA membership matters more than ever

Featured News

SFP, ISSF, and GFW Join Forces to Enhance Supply Chain Transparency in Tuna

Sustainable Fisheries Partnership (SFP), Global Fishing Watch (GFW), and ISSF are collaborating to improve transparency in global tuna fisheries. The groups will leverage their extensive databases to help buyers more holistically assess the environmental impacts and compliance of their tuna supply chains. This collaboration was made possible through grant funding from the Walmart Foundation.

The collaboration will utilize SFP’s FishSource and Seafood Metrics platforms, which buyers widely use to monitor sourcing. It will also integrate information from ISSF’s ProActive Vessel Register (PVR) and Vessels in Other Sustainability Initiatives (VOSI), as well as GFW’s Vessel Viewer and Marine Manager. These databases include sustainability indicators beyond the health of fish stocks and management practices, to reflect market needs and ensure responsible tuna sourcing.

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Featured Content

Benefits of ISSA Membership for Seafood Companies

When seafood companies join the International Seafood Sustainability Association (ISSA), they are doing more than supporting tuna and ocean conservation. They are also investing strategically in the resilience, reputation, and long-term success of their business.

For tuna processors, traders, and marketers of any size, ISSA membership can help them to stay competitive, meet customer demands, and secure their place in a future-facing tuna industry. ISSA is a non-profit trade association that powers ISSF. All ISSA members are also ISSF participating companies.

Reasons to Join ISSA

In recent E News issues, we have been focusing on business advantages of ISSA membership. This week’s highlight:

Meet Customer and Market Expectations  

  • Buyer and retailer policies increasingly reference ISSA/ISSF participation and the use of vessels listed on the ISSF PVR and VOSI
  • As a member, ISSF companies can verifiably show and transparently report progress to meet buyer commitments, procurement criteria, and due diligence requirements

If you’re already an ISSF participating company, vessel, retailer, or consultant focused on sustainable tuna, encourage your seafood partners to explore the value of affordable ISSA membership.

Explore Membership

Apply Now


ICYMI

VOSI Transparency Tool Tracks Tuna Vessel Best Practices

ISSF recently released a redesigned version of its Vessels in Other Sustainability Initiatives (VOSI) tool — a first-of-its-kind global transparency resource for seafood supply chain stakeholders to assess tuna vessel participation best-practice sustainability initiatives. The updated VOSI expands the number of practices tracked; new criteria now verify whether vessels are adopting measures to reduce bycatch of vulnerable species like sharks and sea turtles, such as:

  • Use of circle hooks and finfish bait
  • Use of monofilament branch lines
  • Landing sharks with fins naturally attached
  • Avoiding the use of shark lines

The enhanced tool also continues to report on other practices, from non-entangling and biodegradable FAD use to electronic monitoring and MSC Improvement Program participation. All commitments are independently verified by MRAG Americas through an annual documentation review process, ensuring that vessel-reported actions are credible and transparent.

A new, intuitive platform interface makes it easier for users to filter vessels by specific sustainability practices, vessel flag, or identifier. Quick links to PVR data and exportable vessel profiles help create a seamless user experience.

Explore the redesigned tool

Vessel owners: Apply to VOSI

NEW: Jelly-FAD Wins Top Honor at the Responsible Seafood Summit | ISSF is Responsible Seafood Innovation Awardee

Featured News

Recognizing Innovation: Jelly-FAD Named Winner, Responsible Seafood Innovation Awards

Each year, the Responsible Seafood Innovation Awards spotlight fresh solutions to some of the industry’s toughest challenges. This week, ISSF won the Global Seafood Alliance’s Responsible Seafood Innovation Award in the fisheries category for its Jelly-FAD — a fish aggregating device (FAD) that reduces bycatch, ghost fishing and ocean pollution. Built from sustainable, locally sourced materials and free of netting, it cuts entanglement risks while maintaining fishing efficiency.

Read More

View the ISSF Jelly-FAD Construction Guide

 

Featured Content

Benefits of ISSA Membership for Seafood Companies

When seafood companies join the International Seafood Sustainability Association (ISSA), they are doing more than supporting tuna and ocean conservation. They are also investing strategically in the resilience, reputation, and long-term success of their business.

For tuna processors, traders, and marketers of any size, ISSA membership can help them to stay competitive, meet customer demands, and secure their place in a future-facing tuna industry. ISSA is a non-profit trade association that powers ISSF. All ISSA members are also ISSF participating companies.

Reasons to Join ISSA

In the coming weeks, we will focus on other business advantages of ISSA membership. This week’s highlight: Build Brand Trust Through Integrity.

  • ISSA members undergo independent audits, publicly reporting their performance against ISSF conservation measures.
  • These actions demonstrate credibility, transparency, and a commitment to continuous improvement—earning recognition through ISSF reports and communications.

If you’re already an ISSF participating company, vessel, retailer, or consultant focused on sustainable tuna, encourage your seafood partners to explore the value of affordable ISSA membership.

Explore Membership

Apply Now

 

Featured Resource

REPORT: ISSF Evaluates Tuna Stock Sustainability Against MSC Criteria
ISSF released its updated report assessing the status of the world’s tuna stocks against Marine Stewardship Council (MSC) certification criteria. The analysis benchmarks 23 major commercial tuna stocks on abundance, management, and ecosystem impacts — offering a clear picture of where fisheries are well-aligned with MSC requirements and where improvements are still needed.

Key findings include progress on harvest strategies in some regions, while gaps remain in ensuring precautionary reference points and effective bycatch mitigation measures. The report helps seafood companies, NGOs, and RFMOs track alignment with global sustainability standards and identify priorities for action.

Read the Report

ISSF in the News

Three Impactful Forces Collaborate to Enhance Supply Chain Transparency in Tuna

Read the article

ISSA Membership = Smart Seafood Strategy | Support science-based conservation and stay competitive

Featured News

Benefits of ISSA Membership for Seafood Companies

When seafood companies join the International Seafood Sustainability Association (ISSA), they are doing more than supporting tuna and ocean conservation. They are also investing strategically in the resilience, reputation, and long-term success of their business.

For tuna processors, traders, and marketers of any size, ISSA membership can help them to stay competitive, meet customer demands, and secure their place in a future-facing tuna industry. ISSA is a non-profit trade association that powers ISSF. All ISSA members are also ISSF participating companies.

Together, ISSA and ISSF deliver unmatched expertise, practical tools, and a network of like-minded businesses, scientists and environmental NGOs working to improve the long-term health of global tuna fisheries

Reasons to Join ISSA
In the coming weeks, we will focus on other business advantages of ISSA membership. This week’s highlight: Protect and Future-Proof Your Supply Chain

  • Support science-based conservation measures that safeguard tuna stock and thereby de-risk your company’s capital infrastructure.
  • Align with ISSF initiatives that help to secure a stable, responsible seafood supply — enhancing your company’s attractiveness to customers, financial institutions, and investors.

If you’re already an ISSF participating company, vessel, retailer, or consultant focused on sustainable tuna, encourage your seafood partners to explore the value of affordable ISSA membership.

Explore Membership

Apply Now

ICYMI

ISSF Annual Compliance Report Highlights Industry Progress in Tuna Sustainability and New Conservation Requirements

Report shows 99.6% conformance by participating companies with 33 ISSF conservation measures and 77.5% conformance by PVR-listed vessels with 12 measures

ISSF published its latest ISSF Annual Conservation Measures & ProActive Vessel Register Compliance Report, showcasing the continued commitment of participating companies to sustainable tuna fisheries and responsible supply chains.

For the 2024 audit period, the 24 ISSF participating companies achieved a 99.6% conformance rate across 33 ISSF conservation measures. The report also presents the first audited results for Conservation Measure (CM) 2.5 – Transparency in Reporting Progress Against ISSF’s Five-Year Goal and for the reduction in sourcing Indian Ocean yellowfin tuna, newly in effect under CM 1.3 – IOTC Yellowfin Tuna Rebuilding. In addition, it summarizes the aggregate compliance of vessels on the ProActive Vessel Register (PVR) with ISSF measures applicable to vessel operations.

Read the report

 

Featured Resource

ISSF Expands Tuna Vessel Best Practices Tracked in VOSI Transparency Tool

ISSF released a fully redesigned version of its Vessels in Other Sustainability Initiatives (VOSI) tool — a global transparency resource that enables seafood supply chain stakeholders to assess tuna vessel participation in MSC-certified fisheries, fishery improvement projects (FIPs), and other best-practice sustainability initiatives.

The redesigned VOSI expands the number of vessel best practices it tracks to reflect the latest science and evolving industry standards. New criteria now verify whether vessels are adopting measures to reduce bycatch of vulnerable species like sharks and sea turtles, such as:

  • Use of circle hooks and finfish bait
  • Use of monofilament branch lines
  • Landing sharks with fins naturally attached
  • Avoiding the use of shark lines

The enhanced tool continues to report on other practices, from non-entangling and biodegradable FAD use to electronic monitoring and MSC Improvement Program participation. All listed commitments are independently verified by MRAG Americas, ensuring that vessel-reported actions are both credible and transparent. In addition, a new intuitive interface makes it easier for users to filter vessels by sustainability practices, vessel flag, or identifier. Quick links to ProActive Vessel Register (PVR) data and exportable vessel profiles help create a seamless user experience.

Explore the redesigned tool: https://www.iss-foundation.org/vessel-and-company-commitments/vessels-in-other-sustainability-initiatives-vosi/vosi-tool/

Vessel owners interested in applying: Apply to VOSI

 

 

 

 

Charting Tuna’s Future | IATTC Meeting Updates, FAD Recovery Report & RFMO Best Practices

Featured News

Strategizing for Tuna’s Future at IATTC Meeting

Common Oceans and Partners Progress Future Fisheries Management

The Common Oceans Tuna Project hosted a side event during the annual meeting of the Inter-American Tropical Tuna Commission (IATTC) in Panama, spotlighting global progress in the adoption of harvest strategies by Regional Fisheries Management Organizations (RFMOs).

Continue reading

  

ICYMI

Report Highlights Global Strategies for Recovering Tuna FADs

Galápagos Workshop Report Offers Roadmap for Effective FAD Retrieval Programs Across Oceans
ISSF has released a new report detailing outcomes from the First International Workshop on Fish Aggregating Device (FAD) Recovery, held in the Galápagos Islands in May 2024. Organized in collaboration with TUNACONS and WWF Ecuador, the workshop brought together 63 experts from across the global tuna supply chain to identify practical solutions for recovering lost and abandoned FADs before they can harm marine ecosystems.

The newly published report provides the first-ever global framework for designing and implementing FAD Recovery Programs (FRPs)—both at sea and along coastlines. It outlines science-based strategies, stakeholder collaboration models, financing approaches, and policy recommendations for tuna RFMOs.

Read the report

 

Featured Resource

RFMO Best Practices Snapshot — Observer Requirements

This “snapshot” identifies best practices in observer requirements, and then shows each RFMO’s progress in implementing those practices.

Download

 

 

ISSF in the News

IATTC reduces length of purse seine fishing closure, makes mixed progress on FADs
Seafood Source

OPINION: Mixed outcomes at IATTC 2025 – progress for tropical tunas, misses on harvest strategies
World Fishing & Aquaculture

Vigo tuna conference day one recap: Spanish sector confronts trade policy, harsh fishery management
Undercurrent News

 

 

ISSF Reviews IATTC Meeting Outcomes | PLUS MSC Certification: ISSF Tools for Stakeholders

Featured News

Mixed Outcomes at IATTC 2025: Progress for Tropical Tunas, Misses on Harvest Strategies

When the Inter-American Tropical Tuna Commission (IATTC) convened its 2025 Annual Meeting, the stakes were high for the sustainability of tuna fisheries in the Eastern Pacific Ocean (EPO). Ahead of the meeting, ISSF identified a set of science-based priorities to advance conservation of tropical tunas, improve FAD management, strengthen bycatch mitigation, and support transparency and compliance.

After a week of intense negotiations, the meeting delivered more than many expected in some areas — particularly for tropical tunas and FAD management. Yet progress was uneven, with important gaps on longline observer coverage, harvest strategies, bycatch mitigation, and ecosystem-based fisheries management.

A new blog by Holly Koehler, Vice President, Policy and Outreach, and Dr. Gala Moreno, Senior Scientist, reviews the outcomes of the 2025 IATTC annual meeting.

Read the blog

 

Featured Report

Evaluating Tuna Stocks Against MSC Criteria
ISSF has published the updated report An Evaluation of the Sustainability of Global Tuna Stocks Relative to Marine Stewardship Council Criteria. This science-based analysis reviews 23 major tuna stocks worldwide and benchmarks their status against MSC requirements. It’s an essential reference for fishery managers, companies, and NGOs working to advance tuna sustainability in line with the MSC Standard.

Read the report

 

Featured Resource

MSC-Certified & In-Assessment Tuna Fisheries
ISSF maintains a regularly updated table of tuna fisheries that are either MSC-certified or undergoing full assessment. With links to each fishery’s profile on the MSC Track a Fishery site, the tool helps stakeholders monitor certification progress and identify opportunities for continuous improvement. Currently, about half of the world’s annual tuna catch comes from MSC-certified fisheries.

Explore the table

 

ISSF in the News
An international report outlines a roadmap for restoring FADs and protecting the oceans.

Europa Azul

Tuna Insights: Global FAD Recovery, Bycatch Report & Jelly-FAD Guide | Explore ISSF’s latest science and resources helping fishers, companies, and RFMOs strengthen tuna sustainability worldwide

Featured News

New Report Highlights Global Strategies for Recovering Tuna FADs

Galápagos Workshop Report Offers Roadmap for Effective FAD Retrieval Programs Across Oceans
ISSF has released a new report detailing outcomes from the First International Workshop on Fish Aggregating Device (FAD) Recovery, held in the Galápagos Islands in May 2024. Organized in collaboration with TUNACONS and WWF Ecuador, the workshop brought together 63 experts from across the global tuna supply chain to identify practical solutions for recovering lost and abandoned FADs before they can harm marine ecosystems.

This new ISSF report is the only publication to offer a comprehensive overview of FAD retrieval programs worldwide. It also provides the first-ever global framework for designing and implementing FAD Recovery Programs (FRPs)—both at sea and along coastlines. It outlines science-based strategies, stakeholder collaboration models, financing approaches, and policy recommendations for tuna Regional Fisheries Management Organizations (RFMOs).

Highlights from the Report:

  • Blueprint for FRPs: The report defines essential components of effective recovery programs, from operational protocols and legal frameworks to real-time tracking and trajectory prediction tools.
  • New Financing Proposals: Recommendations include levies on satellite buoys, extended producer responsibility (EPR) principles, and reuse of recovered FADs for scientific or artisanal applications.
  • Recommendations to RFMOs: The report urges RFMOs to clarify FAD ownership rules, exempt out-of-zone FADs from active limits, and classify retrieval as a non-fishing activity, enabling broader participation in recovery efforts.
  • Support for Pilot Programs: It advocates for 6-12-month FRP pilots to test, adapt, and refine program models in real-world conditions.
  • Case Studies from the Field: Lessons from active programs in the Seychelles, U.S. Palmyra Atoll, and the Galápagos illustrate scalable approaches led by governments, NGOs, and fishers.

View the Report 

Featured Content

REPORT: Tuna Fisheries’ Impacts on Non-Tuna Species and Other Environmental Aspects

Tuna fisheries use different types of fishing gears and strategies to catch tunas. All of them have some sort of environmental impact, the most obvious one being the catch of non-tuna species, some of which are highly vulnerable.

The report Tuna Fisheries’ Impacts on Non-Tuna Species and Other Environmental Aspects, summarizes some of the main impacts for fisheries that catch the major commercial tunas. It also analyzes the environmental scores obtained by different tuna fishery types certified by the Marine Stewardship Council, showing that most of the main fishing methods have some type of impacts on non-tunas, habitats, and ecosystems. The report then reviews the management measures adopted by RFMOs to mitigate these impacts, and this information is complemented with a description of other conservation measures adopted by ISSF that enable seafood companies and vessels to improve the sustainability of tuna fisheries.

Learn More 

Featured Resource

Jelly-FAD Construction Guide Helps Fishers Build Netting-free, Biodegradable FADs for More Sustainable Tuna Fishing

ISSF published a comprehensive step-by-step guide that shows commercial tuna fishers how to build “jelly-FADs” — an innovative nearly 100% biodegradable and non-entangling design for fish aggregating devices (FADs).

To reduce FAD fishing’s effects on non-target marine animals and ocean ecosystems, ISSF scientists developed the jelly-FAD in collaboration with physical oceanographers from the Instituto de Ciencias del Mar (CSIC) and tuna fleets — testing and refining the design through workshops, lab research, and at-sea trials in real fishing conditions.

“The Jelly-FAD Construction Guide shows tuna fishers how to build what we believe is the most sustainable non-entangling FAD to date,” said Dr. Gala Moreno, ISSF senior scientist. “The jelly-FAD represents a new concept in drifting FADs, whose structure and materials have been relatively static for decades. To make jelly-FADs, you do not need to have unusual materials, special equipment, or advanced carpentry skills. We intend the jelly-FAD to be as simple and affordable as possible for fishers around the world to build.”

Inspired by the neutral buoyancy of jellyfish, the jelly-FAD design not only is made without netting but also is almost completely biodegradable, and it offers additional sustainability and durability advantages over previous non-entangling FAD and biodegradable FAD designs.

Download the Jelly-FAD Construction Guide

  

ISSF in the News

The International Seafood Sustainability Foundation Urges Action On Tuna Stocks
Deeper Blue

NGOs urging IATTC to codify harvest strategies, review Pacific bluefin management procedures at upcoming meeting
Seafood Source

87% of Global Tuna Catch from Healthy Stocks | PLUS: Priorities for EPO Tuna + Interactive Resources

Featured Report

87% of Global Tuna Catch Comes from Stocks at Healthy Levels; 2% Requires Stronger Management

Catch from Overfished Stocks Decreased By Eight Percentage Points Versus November 2024 Report

Of the total commercial tuna catch worldwide, 87% comes from stocks at “healthy” levels of abundance, according to the March 2025 ISSF Status of the Stocks report, marking a one-percentage-point decrease compared to previous November 2024 report findings. Overfished stocks account for 2% of the total catch—down eight percentage points from the last report. The percentage of the catch that came from stocks at an intermediate level of abundance is 10%—an eight-percentage-point increase from November 2024 findings.

Produced several times each year, the Status of the Stocks report presents a comprehensive analysis of tuna stocks by species. The Evaluation of the Sustainability of Global Tuna Stocks Relative to MSC Criteria provides scores for the stocks and RFMOs based on MSC assessment criteria. Together, these tools help define the continuous improvement achieved and the areas and issues that require more attention.

Learn more

 

ICYMI

BLOG: Securing the Future of Eastern Pacific Tuna Fisheries

The Eastern Pacific Ocean (EPO) is home to some of the world’s most productive tuna fisheries, supplying a vital source of protein to millions of people while sustaining coastal economies across the Americas and beyond. The Inter-American Tropical Tuna Commission (IATTC) plays a central role in ensuring these fisheries are managed sustainably. As delegates prepare for the IATTC’s 2025 Annual Meeting in September, ISSF is urging action on a set of science-driven priorities to safeguard the long-term health of tuna stocks and the ecosystems that support them.

Continue reading

 

Featured Resources

Verifying Seafood Industry Commitments

ISSF launched an in‑depth web feature spotlighting its ISSF Annual Conservation Measures & ProActive Vessel Register Compliance Report — an independent, third‑party audit report that benchmarks transparency and accountability among tuna companies and vessels.

The interactive feature highlights striking results: 99.6 % overall company compliance across 24 audited participants and a 77.5 % vessel pass rate on the ProActive Vessel Register. It also introduces first‑time audited outcomes for ISSF Conservation Measures 2.5 (transparency in reporting sustainable sourcing) and 1.3 (reducing Indian Ocean yellowfin tuna sourcing), underscoring progress in traceability and stock rebuilding efforts. Enhanced visuals detail roadmap commitments, audit scores, and vessel performance.

Dive in

 

A Global View of Influence for Sustainable Fishing Policies

Beginning with a network of 24 leading seafood companies and extending to Marine Stewardship Council (MSC)-certified tuna fisheries and tuna fishery improvement projects (FIPs) — including stakeholders that ISSF technical experts engage with — ISSF’s advocacy partnerships have a broad global reach and impact. An updated Web feature visualizes that “influence network” in four major tuna fishing regions.

Explore

  

ISSF in the News

The global fleet of tropical tuna purse seiners is growing, but fishing capacity is barely growing.
Europa Azul

ISSF urges IATTC to adopt effective harvest strategies, increase observer ratios, and improve management measures for tuna in the EPO
Industrias Pesqueras

BLOG: Securing the Future of Eastern Pacific Tuna Fisheries | Our Priorities for the IATTC Annual Meeting

Featured News

Securing the Future of Eastern Pacific Tuna: ISSF’s 2025 Priorities for the IATTC

The Eastern Pacific Ocean (EPO) is home to some of the world’s most productive tuna fisheries, supplying a vital source of protein to millions of people while sustaining coastal economies across the Americas and beyond. The Inter-American Tropical Tuna Commission (IATTC) plays a central role in ensuring these fisheries are managed sustainably. As delegates prepare for the IATTC’s 2025 Annual Meeting in September, ISSF is urging action on a set of science-driven priorities to safeguard the long-term health of tuna stocks and the ecosystems that support them.

The 2025 ISSF position statement emphasizes three interconnected areas: adopting effective harvest strategies; strengthening electronic monitoring (EM) and increasing observer coverage; and implementing science-based tuna conservation measures. Together, these steps can help secure the future of the region’s fisheries, supporting healthy marine ecosystems and responsible resource stewardship.

Continue reading

Featured Graphic

Tuna RFMOs and the Development of MSE and Precautionary Management Procedures for Tunas

This timeline graphic shows 2011–2024 milestones in efforts by all tuna Regional Fisheries Management Organizations (RFMOs) to develop management strategy evaluations (MSE) and precautionary management procedures (MP) for albacore, bigeye, bluefin, and skipjack tuna stocks.

View the graphic

ICYMI

Updated ISSF Report Assesses Tuna Stock Sustainability Against MSC Criteria

12 of 23 Global Tuna Stocks Meet MSC Principle 1 Benchmark; 7 of 23 Stocks Have Harvest Control Rules for Sustainable Management

ISSF has published the latest edition of its comprehensive report, An Evaluation of the Sustainability of Global Tuna Stocks Relative to Marine Stewardship Council Criteria. The report assesses the 23 major commercial tuna stocks worldwide against the Marine Stewardship Council (MSC) Fisheries Standard, offering an informed view of global progress and remaining gaps in achieving tuna fisheries sustainability.

Learn more

ISSF in the News

ISSF finds minimal lift in large-scale tropical tuna purse seine capacity

Undercurrent News

ISSF Releases 2025 Snapshot of Large-Scale Tropical Tuna Purse Seine Fishing Fleets

Fish Focus

2025 Tuna Fleet Snapshot: Growth with Stable Capacity | ISSF report tracks global purse-seine trends & sustainability progress

Featured News

ISSF Releases 2025 Snapshot of Large-Scale Tropical Tuna Purse Seine Fishing Fleets

Report Shows 3.8% Growth in Vessel Numbers with Minimal Capacity Increase; 74% of Vessels Listed on ISSF ProActive Vessel Register 

ISSF has released its updated Snapshot of the Large-Scale Tropical Tuna Purse Seine Fishing Fleets report, a unique global assessment of vessel capacity trends in tropical tuna fisheries. The authors estimate that, as of June 2025, 675 large-scale purse-seine (LSPS) vessels are fishing for tropical tuna species — an increase of 3.8% compared to last year — with a combined fish hold volume (FHV) of over 864,000 m3 (cubic meters), representing a less than 0.2% increase from last year in overall fishing capacity.

“ISSF is the only organization that aggregates and analyzes global capacity data for these fleets year over year,” said Dr. Victor Restrepo, ISSF Vice President of Science. “Our snapshot series provides science-based insights to support RFMO and industry decision-making on sustainable tuna fishing capacity management — an issue central to long-term ocean health.”

LSPS vessels, defined as those with at least 335 m³ in FHV, account for the majority of the world’s tropical tuna catch. To update the report, ISSF compiles data from RFMO vessel registries and other sources, focusing on vessels targeting skipjack, yellowfin, and bigeye tuna.

Continue reading

 

ISSF in the News

Reeling in Responsibility: The Path to Sustainable Tuna Fisheries
Like many fish populations, several species of tuna faced steep declines over the past few decades. Thanks to regional management and other efforts to promote sustainable tuna fisheries, some are bouncing back.

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Featured Video

Science First
In this brief video, ISSF President Susan Jackson shares how science drives our mission — ensuring healthy tuna stocks, reducing bycatch, and supporting continuous improvement in fisheries management. By uniting scientists, managers, and fishers around the best available data, we can achieve lasting sustainability for tuna and the oceans we all depend on.

Watch

 

Global Tuna Stocks Assessed Against MSC Standard | Updated Reports Track Tuna Sustainability and Industry Compliance Progress

Featured News

Updated ISSF Report Assesses Tuna Stock Sustainability Against MSC Criteria

12 of 23 Global Tuna Stocks Meet MSC Principle 1 Benchmark;
7 of 23 Stocks Have Harvest Control Rules for Sustainable Management

ISSF has published the latest edition of its comprehensive report, An Evaluation of the Sustainability of Global Tuna Stocks Relative to Marine Stewardship Council Criteria. The report assesses the 23 major commercial tuna stocks worldwide against the Marine Stewardship Council (MSC) Fisheries Standard, offering an informed view of global progress and remaining gaps in achieving tuna fisheries sustainability.

This edition applies v3.1 of the MSC Fisheries Standard, evaluating tuna stock health (MSC Principle 1) and the effectiveness of regional management frameworks (part of MSC Principle 3). The report’s insights are useful in informing seafood stakeholders and policymakers about where improvements are most needed to meet rigorous sustainability benchmarks.

Learn More

 

Featured Graphic

An updated graphic, based on data from the 2025 report An Evaluation of the Sustainability of Global Tuna Stocks Relative to Marine Stewardship Council Criteria, shows what the average scores based on Principle 1 have been since 2013, and how they have changed over time.

The MSC’s Principle 1 states: “A fishery must be conducted in a manner that does not lead to overfishing or depletion of the exploited populations and, for those populations that are depleted, the fishery must be conducted in a manner that demonstrably leads to their recovery.”

Download

 

ICYMI

Verifying Seafood Industry Commitments

ISSF launched an in‑depth web feature spotlighting its latest ISSF Annual Conservation Measures & ProActive Vessel Register Compliance Report — an independent, third‑party audit report that benchmarks transparency and accountability among tuna companies and vessels.

The interactive feature highlights striking results: 99.6 % overall company compliance across 24 audited participants and a 77.5 % vessel pass rate on the ProActive Vessel Register. It also introduces first‑time audited outcomes for ISSF Conservation Measures 2.5 (transparency in reporting sustainable sourcing) and 1.3 (reducing Indian Ocean yellowfin tuna sourcing), underscoring real progress in traceability and stock rebuilding efforts. Enhanced visuals detail roadmap commitments, audit scores, and vessel performance — bringing full clarity to the tuna supply chain. This feature reinforces ISSF’s leadership in driving verifiable sustainability and elevating expectations for industry accountability.

Dive In

 

ISSF in the News

ISSF urges stronger tuna protections
World Fishing & Aquaculture

 

Latest ISSF report shows its members holding fast on commitment to sustainable tuna
Seafood Source