Making Better Choices: What Is the Most Sustainable Seafood?
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Seafood is a favorite meal for millions of people around the world, but many ocean lovers are asking an important question: what is the most sustainable seafood? As pressure on marine ecosystems increases, the choices we make at the seafood counter can directly affect ocean health. Overfishing, destructive fishing methods, and poorly managed aquaculture have placed many species under serious strain. The good news is that consumers have more power than they might realize. By learning how seafood is caught or farmed and choosing the most sustainable seafood when possible, we can support healthy marine ecosystems while still enjoying delicious ocean-inspired meals.
Table of Contents:
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Understanding What Sustainable Seafood Means
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The Hidden Impact of Bycatch
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Aquaculture: When Farmed Seafood Is Sustainable
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How to Identify the Most Sustainable Seafood at the Store
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Smart Seafood Choices Divers Can Make
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Why Ocean Lovers Have a Unique Role
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The Future of Sustainable Seafood
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Dive Deeper
Before identifying the most sustainable seafood, it helps to understand what sustainability really means in the context of fishing and aquaculture. In simple terms, sustainable seafood comes from sources that can maintain healthy populations long-term without damaging the surrounding ecosystem.
Overfishing is one of the biggest global challenges. According to the FAO's 2024 State of World Fisheries and Aquaculture report, only 62.3 percent of marine fishery stocks were fished within biologically sustainable levels in 2021. This means that more than one-third were outside biologically sustainable levels, often because fish are being removed from the ocean faster than they can reproduce. When fish populations decline, the entire marine food web can suffer, affecting predators, reef systems, and coastal communities that rely on fishing for their livelihoods.
Want to understand the bigger picture? Read SSI's guide to overfishing and its impact on the ocean.
Responsible fisheries work within strict catch limits and monitor fish populations carefully. When you choose the most sustainable seafood, you are supporting fisheries that allow marine species to reproduce and maintain stable populations.
Divers often witness firsthand how vibrant healthy reefs and coastal ecosystems can be. Protecting fish populations through sustainable choices helps ensure those underwater environments remain thriving habitats rather than depleted ecosystems.
Another important issue when discussing the most sustainable seafood is bycatch. Bycatch refers to animals that are accidentally caught while targeting other species. These unintended catches can include turtles, dolphins, sharks, rays, and seabirds.
Some fishing methods produce extremely high levels of bycatch. For example, certain types of longline fishing gear can stretch for more than 80 kilometers (50 miles) and contain thousands of baited hooks. Without careful management, this gear can unintentionally catch protected species.
However, many fisheries are improving their methods. Innovations such as turtle exclusion devices, circle hooks, and modified nets have reduced accidental capture in some regions. Choosing the most sustainable seafood often means selecting fish harvested using gear designed to minimize harm to other marine life.
For ocean lovers, this is especially important. Every thoughtful purchase encourages fisheries to continue improving their practices and protecting species that divers treasure seeing underwater.
Wild fisheries often receive most of the attention, but aquaculture now supplies more than half of aquatic animal foods produced for human consumption worldwide. This raises another question: can farmed fish be the most sustainable seafood option?
The answer depends on how the farm operates. Responsible aquaculture can reduce pressure on wild fish populations and provide a consistent food supply. However, poorly managed farms can create pollution, spread disease, or rely on large amounts of wild fish feed.
Modern sustainable aquaculture systems are becoming much more efficient. Some farms use recirculating water systems that filter and reuse water. Others carefully manage feed so that waste and environmental impacts are minimized.
Certain species also farm particularly well because they require less feed or naturally filter water. Shellfish like mussels and oysters are often considered among the most sustainable seafood choices because they improve water quality while growing and require no additional feed.
For divers and ocean advocates, supporting well-managed aquaculture helps encourage responsible farming practices that protect coastal ecosystems.
Finding the most sustainable seafood might seem complicated, but several tools make it easier. Many grocery stores and seafood markets now label products to show where they were caught or farmed and how they were produced.
Certification programs can also help consumers make informed decisions. Organizations like the Marine Stewardship Council evaluate fisheries against strict environmental standards. When you see certified products, it indicates that the fishery follows sustainable management practices.
Another helpful approach is choosing local seafood whenever possible. Local fisheries often operate on smaller scales and may have stronger regulations that protect nearby ecosystems. Buying from local fishmongers or coastal markets can also reduce the environmental impact associated with long-distance transportation.
Ultimately, identifying the most sustainable seafood becomes easier once you begin paying attention to sourcing information and asking questions about how seafood was harvested.
Divers and ocean enthusiasts often feel a deeper connection to marine life. Because of that connection, choosing the most sustainable seafood can become part of a broader ocean conservation mindset.
One practical step is learning which species reproduce quickly and can handle fishing pressure better. Small pelagic fish such as sardines and anchovies tend to reproduce rapidly and can be more resilient when fisheries are properly managed.
Another tip is diversifying seafood choices. Many consumers rely on a small group of popular species like tuna, salmon, or shrimp. Expanding your palate to include lesser-known fish can reduce pressure on heavily targeted species and support fisheries that manage abundant populations.
Cooking habits also matter. Planning meals carefully reduces waste and ensures that every purchase is used fully. When people value seafood more thoughtfully, they naturally begin prioritizing the most sustainable seafood options available.
These small shifts create a ripple effect that supports healthier marine ecosystems over time.
Want to do more for the ocean? Read: Top 10 Ways Divers Can Get Involved in Marine Conservation
People who spend time in the ocean often develop a powerful appreciation for marine biodiversity. Whether snorkeling through seagrass meadows or scuba diving along coral reefs, witnessing healthy ecosystems firsthand reinforces why choosing the most sustainable seafood matters.
Many divers participate in conservation programs through organizations such as Scuba Schools International. Programs such as the SSI Blue Oceans program and the SSI Marine Ecology specialty program focus on marine life protection, marine ecology, and ocean protection. They help divers better understand how fishing practices affect marine habitats and how everyday choices can support healthier oceans.
Love marine life? Read this: Manta Ray Conservation: The Ultimate Guide for Scuba Divers
When divers talk about responsible seafood choices with friends, family, and local restaurants, they become ambassadors for healthier oceans. Conversations about the most sustainable seafood can encourage restaurants and suppliers to rethink their sourcing practices as well.
In this way, awareness spreads far beyond individual purchases and begins influencing the broader seafood industry.
The global seafood industry is evolving rapidly as technology and environmental awareness improve. Satellite tracking, improved fishery monitoring, and more responsible aquaculture methods are all helping make the most sustainable seafood easier to identify.
Governments and international organizations are also strengthening policies that protect marine resources. Many regions now establish marine protected areas where fishing is restricted, allowing ecosystems to recover and fish populations to rebuild.
At the same time, consumer demand is driving change. When people consistently choose the most sustainable seafood, businesses respond by sourcing products that meet higher environmental standards.
For ocean lovers, this is an encouraging trend. Every responsible purchase signals that protecting marine ecosystems is a priority worth supporting.
Choosing the most sustainable seafood is not necessarily about giving up seafood entirely. Instead, it is about making thoughtful decisions that support healthy oceans and responsible fisheries. By understanding challenges like overfishing, bycatch, and aquaculture impacts, consumers can better recognize which options are truly sustainable.
To keep learning about ocean conservation and marine ecosystems, connect with an SSI Training Center or Resort or explore SSI environmental programs.