Ordering seafood at a restaurant can seem like an easy way to enjoy a nutritious meal. Fish can provide high-quality protein, omega-3 fatty acids, vitamins, and minerals, but not every seafood choice raises the same considerations.
Some species can contain more mercury than others. Certain fisheries have faced sustainability challenges, while some farmed seafood depends heavily on how and where it is produced. Seafood mislabeling and limited information about sourcing can also make it difficult for diners to know exactly what they are ordering.
That doesn’t mean the fish below should always be avoided. In many cases, the specific source, portion size, preparation method, and frequency of consumption matter more than the species name alone.
Here are 10 seafood choices that may deserve a little extra attention when you see them on a restaurant menu.
1. Bluefin Tuna
Bluefin tuna is highly prized for its rich flavor and firm, fatty texture, particularly in sushi restaurants.
However, bluefin tuna has faced considerable fishing pressure, and conservation concerns vary among different populations and fisheries. Because these fish are large predators with long lifespans, they can also accumulate mercury.
If you’re looking for a more environmentally conscious option, ask where the tuna was caught and whether the restaurant can provide information about its source.
2. Swordfish
Swordfish is popular because its firm texture works particularly well when grilled or seared.
The main health consideration is mercury. As a large predatory fish, swordfish can accumulate relatively high concentrations of mercury.
For most people, the issue is primarily frequency of consumption rather than one occasional serving. However, people who are pregnant, planning pregnancy, breastfeeding, or choosing seafood for young children should pay particular attention to current public-health guidance regarding high-mercury fish.
Lower-mercury alternatives may include salmon, trout, sardines, and other smaller fish.
3. Yellowfin Tuna
Yellowfin tuna appears frequently in sushi, poke bowls, salads, and seared dishes.
Like other tuna species, yellowfin can contain mercury. The amount can vary depending on the individual fish and other factors.
For people who eat seafood regularly, rotating different species can help avoid repeatedly consuming the same contaminants while still providing nutritional variety.
If you’re eating tuna frequently, consider balancing it with lower-mercury seafood choices.
4. Atlantic Cod
Atlantic cod has been a restaurant staple for generations because of its mild flavor and flaky texture.
The concern here is primarily related to sustainability rather than the fish automatically being unhealthy.
Different Atlantic cod populations have experienced very different levels of fishing pressure and management. As a result, simply seeing “Atlantic cod” on a menu doesn’t tell you the complete story.
If sustainable seafood is important to you, ask where the cod was caught and whether the restaurant can provide information about the fishery.
5. Chilean Sea Bass
Despite its name, Chilean sea bass is actually a marketing name commonly used for Patagonian toothfish.
Its rich, buttery texture has made it a popular choice at upscale restaurants. However, the species has historically faced significant fishing pressure, and illegal fishing has also been an issue.
Today, responsibly managed sources do exist, so the fish isn’t automatically an unacceptable choice.
The key question is where the particular fish on your plate came from.
6. Red Snapper
Red snapper is a popular choice for grilling, roasting, frying, and other preparations.
One issue consumers should be aware of is seafood mislabeling. Because genuine red snapper can be relatively valuable, cheaper species have sometimes been sold under misleading names.
That doesn’t mean a restaurant serving red snapper is necessarily doing anything wrong. Reputable restaurants often have established suppliers and traceability procedures.
Still, if you’re paying a premium price for a specific species, there’s nothing wrong with asking about its origin.
7. Farmed Atlantic Salmon
Salmon is well known for its protein and omega-3 content, making it a popular choice among health-conscious diners.
Farmed Atlantic salmon isn’t automatically unhealthy. Modern aquaculture can produce large quantities of seafood efficiently, and production standards vary between farms.
However, environmental concerns can include waste management, disease control, feed production, escapes, and the ecological effects of poorly managed operations.
If sustainability is important to you, look for restaurants that identify their salmon’s source or participate in recognized seafood certification programs.
8. Tilapia
Tilapia is inexpensive, mild, and widely available, making it a common restaurant choice.
You’ve probably heard the claim that tilapia is unhealthy because it is a “bottom feeder.” That description is an oversimplification and shouldn’t be used as a simple measure of seafood quality.
Farmed tilapia are commonly raised on formulated feeds, and the quality of the product depends heavily on farming practices, regulations, and the producer.
Instead of judging tilapia based on internet myths, ask where it was raised if sourcing is important to you.
9. Pangasius or Swai
Pangasius, sometimes sold as swai or basa, is a freshwater fish widely produced through aquaculture.
Its mild flavor and relatively low price have made it popular in restaurants and grocery stores.
Concerns surrounding pangasius have included farming conditions, environmental management, water quality, and supply-chain transparency. At the same time, some dramatic claims about the fish have been exaggerated, so it’s important to distinguish documented concerns from online rumors.
If a restaurant simply lists “catfish” without identifying the species or origin, you can ask what type of fish you’re actually being served.
10. Imported Shrimp
Shrimp isn’t technically a fish, but it deserves consideration because it is one of the most commonly ordered seafood products.
Shrimp can be farmed or wild-caught, and both methods have different environmental considerations.
Some shrimp-farming operations have been associated with habitat loss, water pollution, disease management, and other environmental concerns. Wild shrimp fisheries can also involve bycatch and impacts on marine ecosystems.
Labor and supply-chain transparency have received attention as well.
That doesn’t mean imported shrimp is automatically a poor choice. What matters is how and where it was produced.
What Should You Look for Instead?
You don’t need to avoid seafood simply because you’re concerned about mercury or sustainability.
In fact, many types of seafood can be excellent additions to a balanced diet.
Smaller fish such as sardines and anchovies are generally lower in mercury and provide omega-3 fatty acids. Salmon and trout can also be nutritious choices. Depending on the source, other fish and shellfish can provide plenty of variety.
The important thing is to avoid thinking in terms of a permanent list of “good” and “bad” seafood.
A fish’s environmental impact can depend on its location, fishing method, season, and management practices. Health considerations can depend on portion size and how frequently you eat that species.
Ask Where Your Seafood Comes From
One of the simplest ways to make a more informed restaurant choice is to ask a few questions.
Where was the fish caught or raised?
Was it wild-caught or farmed?
Does the restaurant know the supplier?
Is the seafood certified or otherwise traceable?
These questions are especially useful when ordering expensive or environmentally sensitive species.
A restaurant that is transparent about its seafood sourcing can give you more information than a menu description alone.
Mercury Is About Frequency, Too
When people hear that a fish contains mercury, they may assume that the fish is unsafe to eat.
The reality is more nuanced.
Mercury exposure is influenced by the species, serving size, and frequency of consumption. Large predatory fish generally accumulate more mercury because they eat other fish and live longer.
That’s why dietary guidance often emphasizes limiting certain high-mercury species rather than eliminating all seafood.
People who are pregnant, breastfeeding, or selecting fish for children should follow current guidance from a reliable health authority.
The Bottom Line
There isn’t a universal list of fish that every restaurant customer needs to avoid.
Instead, consider three things: where the seafood came from, how frequently you eat it, and what is known about that particular species.
Bluefin tuna, swordfish, yellowfin tuna, Atlantic cod, Chilean sea bass, red snapper, farmed salmon, tilapia, pangasius, and shrimp can all involve different considerations depending on their source and how they are consumed.
The smartest approach isn’t to fear seafood. It’s to become a more informed seafood customer.
When a restaurant provides clear information about its suppliers and sourcing practices, you have a much better opportunity to choose a meal that fits your dietary preferences and environmental priorities.
Health note: This article provides general information and is not a substitute for personalized medical or dietary advice. If you have questions about mercury exposure, pregnancy, allergies, or your individual dietary needs, consult a qualified healthcare professional or registered dietitian.
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