What Are the Most Sustainable Fish to Eat in UK Waters?

March 10, 2024

As consumers, you have a crucial role in the fate of our seas and oceans. Every time you purchase seafood, your choices can either promote the health of our oceans or contribute to their decline. By selecting to consume sustainable seafood, you send a powerful message to fishermen, fish farmers, and policymakers about the kind of fishing practices you support.

So, what does it mean to eat sustainably? And what are the most sustainable fish species in the UK? Let’s dive in and discover together.

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Sustainable Seafood: What Does it Mean?

Before we delve into the most sustainable fish species to consume in the UK, it’s important to grasp what sustainable seafood means. The concept of sustainability in fishing involves two main aspects: how the fish is caught or farmed, and the status of the species itself.

Sustainable fishing means that the fish are caught in a way that maintains their population over the long term and doesn’t harm the wider marine environment. When talking about farmed fish or seafood, sustainable methods are those that don’t cause significant harm to the environment, other species, or human communities.

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Regarding the fish species, sustainable options are those that are not overfished or endangered. They have a healthy population that can handle the pressures of commercial fishing.

The Marine Stewardship Council (MSC) and Sustainability

The Marine Stewardship Council (MSC) plays an essential role in sustainable fishing. It’s an international non-profit organization that sets the standards for sustainable fishing. Seafood products with the MSC blue fish label are certified as sustainable, meaning they are sourced from wild fisheries that have been independently assessed against the MSC’s science-based standard for environmentally sustainable fishing.

The Most Sustainable Fish Species in the UK

In the UK, several fish species are caught or farmed sustainably. Here are some of the most sustainable options for you to consider.

Wild Salmon

Wild salmon is a great sustainable choice. However, it’s important to note that not all wild salmon is sustainable. The best option is Pacific salmon caught in Alaskan waters, as these stocks are well-managed and healthy. However, UK consumers should be cautious with Atlantic salmon, as some stocks are overfished.


Mackerel is another sustainable fish that is abundant in UK waters. They are fast-growing and reproduce quickly, making them more resilient to fishing pressure. Remember to look for the MSC label to ensure it’s sustainably sourced.


Sardines, or pilchards, are small, oily fish that are one of the most sustainable choices. They’re abundant in UK waters, reproduce quickly, and are often caught with minimal impact on the environment.


Hake is a deep-sea species that is becoming increasingly popular in the UK. It’s a good sustainable option, particularly when caught in the North East Atlantic. The stocks in these waters are healthy and well-managed.

Farmed Shellfish

Farmed shellfish, including mussels, oysters, and clams, are some of the most sustainable seafood choices. They require no feed, as they filter plankton from the water, and farming them can even improve water quality.

Fish to Avoid for Sustainability Reasons

While there are plenty of sustainable fish choices, there are several species you should avoid if sustainability is a concern. These include deep-sea species like orange roughy and bluefin tuna, which grow slowly and are vulnerable to overfishing. Also, farmed salmon can often come from farms with poor environmental practices, while wild-caught prawns can result from highly destructive fishing methods.

Final Words

Choosing sustainable seafood is one of the most effective ways you can help protect our oceans. Consider the source and species of your seafood, and look for the MSC label or other credible certifications. Remember, your choices as a consumer have the power to shape the future of our seas.

The Role of Consumers in Promoting Sustainable Seafood

Every individual consumer of seafood in the UK and elsewhere has a critical role to play in ensuring the health and longevity of our marine ecosystems. By making informed choices and prioritising sustainable seafood, consumers can make a real difference. A consumer’s purchase not only directly affects the financial viability of sustainable fishing practices but also sends a clear message to fishermen, fish farmers, and policymakers regarding the kind of practices that are supported and encouraged.

When consumers choose to buy sustainably caught or farmed fish, they are endorsing the practice of maintaining healthy fish stocks and supporting fishing methods that cause minimal harm to the marine environment. This support goes beyond just the well-being of the fish species; it extends to the broader marine ecosystem, including other marine species and the human communities that rely on the sea for their livelihoods and food security.

MSC Certified seafood is a clear indicator that the product has been sourced from fisheries that meet the Marine Stewardship Council’s standard for sustainable fishing. The MSC blue fish label is a reliable guide for consumers who want to make sustainable choices. By buying MSC Certified products, consumers are directly supporting fisheries that have proven their commitment to sustainability.

Consumers also need to be aware of the species of fish they are buying. For instance, while wild-caught Atlantic salmon may seem like a good choice, some stocks of this species are overfished and therefore not a sustainable choice. On the other hand, Pacific salmon caught in Alaskan waters are a better option, as these stocks are well-managed and healthy.

A Call to Action: Making Sustainable Seafood Choices

Consumers have a significant role to play in the conservation of our marine ecosystems. Through informed purchasing decisions, consumers can support sustainable fishing practices and contribute to the health of our oceans. Whether it’s choosing wild salmon from Alaska, MSC Certified mackerel, abundant sardines, deep-sea hake from the North East Atlantic, or farmed shellfish like mussels, oysters, and clams that improve water quality, each choice made by a consumer influences the future of our oceans.

However, making these choices requires a level of awareness and understanding of which fish species are sustainable and which are not. It’s essential to avoid certain species that are vulnerable to overfishing, such as orange roughy and bluefin tuna. Farmed salmon also requires scrutiny, as some farms have poor environmental practices. Similarly, wild-caught prawns can often be traced back to destructive fishing methods.

Consumers must remember that their seafood choices have the power to shape the future of our seas. Therefore, educate yourselves, and make every seafood purchase count towards a healthier, more sustainable ocean. Look for the MSC label or other credible certifications. It’s not just about buying a product; it’s about supporting a process and a future that prioritises sustainability.

In the end, the choice is ours. Together, we can make a difference – one fish at a time.