Seafood Processing & Distribution
What does MSC-certified mean?
9 min read
When you see “MSC-certified” on seafood packaging or a restaurant menu, it means the product has been independently verified as coming from a sustainably managed wild fishery that meets the Marine Stewardship Council (MSC) standard. In simple terms, MSC-certified seafood is intended to be better for the oceans, better managed, and more traceable from ocean to plate.
In this guide, you’ll learn what MSC-certified means, how the certification works, what the blue MSC label stands for, and what to watch out for when choosing certified seafood.
What is MSC?
The Marine Stewardship Council (MSC) is an international non-profit organization founded in 1997. Its mission is to end overfishing and make sure wild seafood is caught in ways that keep fish populations healthy and protect marine ecosystems.
MSC doesn’t catch or sell seafood itself. Instead, it develops a science-based standard for sustainable fishing and a separate standard for traceability in the supply chain. Independent auditors then assess fisheries and companies against these standards.
What does MSC-certified mean?
When a product is described as “MSC-certified,” it means:
- The seafood comes from a wild-capture fishery that has passed an independent sustainability assessment against the MSC Fisheries Standard.
- Every step in the supply chain (from the boat to the final seller) has passed an audit against the MSC Chain of Custody Standard, ensuring the product is traceable and kept separate from non-certified seafood.
- The product is allowed to display the blue MSC label, which signals to consumers that it meets MSC’s requirements.
MSC-certified does not apply to farmed fish (aquaculture). That’s covered by a different program called the Aquaculture Stewardship Council (ASC).
The blue MSC label: what it tells you
The blue MSC ecolabel on packaging, menus, or fish counters is the simplest visual signal of MSC certification. When you see it, you can assume:
- The fish or seafood species is wild-caught.
- The source fishery has been assessed as sustainable and well-managed.
- The product is traceable back to a certified source, reducing the risk of mislabeling or fraud.
- The company is audited regularly to maintain compliance with MSC standards.
However, MSC certification is voluntary. Not all sustainable fisheries are MSC-certified, and not all certified products may be available in every region.
The three core principles of MSC certification
MSC certification is based on three main principles. A fishery must meet all three to be certified.
1. Sustainable fish stocks
The fishery must be operated so that the target species population stays healthy and productive over the long term.
This includes:
- Harvesting at levels that allow the population to replenish naturally
- Avoiding overfishing and depletion
- Using scientific data and stock assessments to set catch limits
If stocks fall below safe biological limits, the fishery must have a recovery plan to rebuild them.
2. Minimizing environmental impact
Fishing activities must be managed so that they minimize harm to the wider marine ecosystem.
Assessors look at:
- Bycatch: How many non-target species (such as dolphins, turtles, seabirds) are accidentally caught, and what measures are in place to reduce this
- Habitat impact: Whether fishing gear significantly damages seafloor habitats like coral reefs or seagrass beds
- Ecosystem effects: How removing certain species affects the food web and biodiversity
Fisheries are expected to use or move toward less damaging gear and methods where possible.
3. Effective management
Certified fisheries must have robust management systems that can respond to changes in stock levels, environmental conditions, and scientific knowledge.
This principle covers:
- Compliance with local, national, and international laws
- Clear, enforceable management plans and regulations
- Effective monitoring and enforcement (e.g., observer programs, catch reporting)
- Decision-making based on best available science
If the fishery doesn’t maintain strong management practices, its certification can be suspended or withdrawn.
How does a fishery become MSC-certified?
The certification process is structured, independent, and often lengthy. The main steps are:
1. Voluntary application
A fishery (or multiple fishing companies together) chooses to apply for assessment. MSC does not force or automatically assess fisheries.
2. Independent assessment
An accredited, independent certification body reviews the fishery against the MSC Fisheries Standard. This includes:
- Gathering data on catch levels, fishing methods, and management systems
- Consulting scientists, governments, environmental NGOs, and other stakeholders
- Performing site visits and audits
Each fishery is scored across detailed performance indicators within the three principles. A passing score is required for certification.
3. Public consultation and review
Draft assessment reports are usually opened to public comment. Interested parties can challenge assumptions or provide extra evidence before the final decision is made.
4. Certification decision
If the fishery meets the standard, it becomes MSC-certified. Certification is valid for up to five years, but with annual surveillance audits and periodic full reassessment.
If conditions are identified (areas needing improvement), the fishery must address them within set deadlines or risk losing certification.
What is the MSC Chain of Custody Standard?
The “MSC-certified” claim on a specific product depends on more than the fishery; it also depends on a secure supply chain.
The Chain of Custody Standard ensures that:
- Certified seafood is kept separate from non-certified seafood along the supply chain
- Records clearly track the product from the certified fishery to the final package or menu item
- Companies undergo regular third-party audits to verify traceability
Every company in the chain—from processors and distributors to supermarkets and restaurants—must be certified against this standard if they are selling products with the MSC label.
Without Chain of Custody certification, a product cannot legally carry the MSC ecolabel, even if it originated from a certified fishery.
MSC-certified vs. other “sustainable” claims
Not all “sustainable” labels or claims are the same. Here is how MSC-certified compares to some common alternatives.
MSC-certified vs. generic sustainability claims
Many products use phrases like “ocean-friendly,” “responsibly sourced,” or “sustainably caught” without referencing an independent standard.
- MSC-certified: Requires independent, third-party assessment against a formal, science-based standard, plus ongoing audits.
- Generic claims: May be based on a brand’s own criteria, with limited transparency or external verification.
MSC-certified vs. other ecolabels
There are several other credible programs in seafood, such as:
- ASC (Aquaculture Stewardship Council) – for farmed seafood
- Friend of the Sea – for wild and farmed products
- Regional certifications – based on national or local standards
MSC focuses specifically on wild-capture fisheries and is widely recognized globally. The presence of the blue label provides a consistent, standardized signal across markets.
What products can be MSC-certified?
MSC certification applies to a wide range of wild-caught seafood, including:
- Finfish (e.g., cod, salmon, tuna, haddock, hake, pollock)
- Shellfish (e.g., shrimp, prawns, scallops)
- Mollusks (e.g., mussels, clams, squid)
- Processed products (e.g., fish fingers, canned tuna, frozen fillets, ready meals)
The key requirement is that the wild species and the fishery are covered by MSC certification, and the product’s supply chain meets Chain of Custody requirements.
Benefits of MSC-certified seafood
For consumers
- Environmental assurance: A straightforward way to choose seafood that aims to support healthier oceans.
- Transparency and traceability: Reduced risk of mislabeling, substitution, or illegal fishing.
- Clear labeling: The blue MSC label simplifies decision-making at the point of purchase.
For fisheries and industry
- Market access: Many retailers, foodservice companies, and brands prefer or require MSC-certified supply.
- Reputation: Certification signals responsible practices to buyers and the public.
- Continuous improvement: Fisheries often upgrade management, data collection, and gear to meet or maintain the standard.
Criticisms and limitations of MSC certification
Although MSC is widely respected, it is not without criticism. Understanding these helps you make a more informed choice.
Common concerns include:
- Certification of controversial fisheries: Some environmental groups argue that certain certified fisheries still have bycatch or habitat impacts they consider too high.
- Complexity and cost: Small-scale or developing-world fisheries may struggle with the expense and administrative demands of certification.
- Perception vs. perfection: MSC-certified does not mean “impact free” or “perfect.” It means the fishery is judged to meet a threshold of sustainability and good management, often with conditions for improvement.
MSC responds that:
- Its standard is regularly updated to reflect new science and expectations.
- Fisheries can lose certification if they fail to keep improving or if conditions are not met.
- It’s designed as a practical, scalable system that encourages continuous progress, not an unattainable ideal.
How to verify if something is truly MSC-certified
To check if a product or fishery is genuinely MSC-certified:
- Look for the blue MSC label on packaging, menus, or fish counters.
- Check the MSC website: The MSC’s “Track a fishery” or product finder tools list certified fisheries and products.
- Ask the retailer or restaurant:
- Where is this seafood from?
- Is it MSC-certified, and can they show documentation if it’s not clearly labeled?
- Check for the license code: Many products print an MSC license or supplier code that corresponds to their certification.
If a product claims to be “MSC-sourced” but does not show the label, it may be using raw material from certified fisheries without fully meeting the Chain of Custody requirements for labeling.
How to choose seafood responsibly using MSC certification
If you want to make more sustainable seafood choices:
- Use the blue MSC label as a simple, quick filter when shopping or ordering.
- Combine MSC-certified choices with local guidance, such as:
- Government advisories on mercury or contaminants
- National seafood guides (e.g., “best choice” or “good alternative” lists)
- Support retailers and restaurants that offer and highlight MSC-certified options, as this creates market demand for better-managed fisheries.
- Stay informed that “MSC-certified” is a strong, but not perfect indicator of sustainability—one tool among several for responsible seafood consumption.
Key takeaways
- MSC-certified means seafood comes from a wild-capture fishery that meets the Marine Stewardship Council’s sustainability standard and passes independent audits.
- The blue MSC label signals that the fishery is assessed for sustainable stocks, minimized environmental impact, and effective management, and that the product is traceable through a certified supply chain.
- MSC certification offers more credibility than generic “sustainable” claims, but it is not without debate and is best used alongside other information and local guidance.
- Choosing MSC-certified seafood is a practical way to support better managed fisheries and contribute to the long-term health of the oceans.