Worst: King Mackerel But king mackerel -- especially ones caught in the Pacific Ocean -- are high in mercury. Doctors say young children and women who are pregnant or nursing should avoid them completely.
Are you aware that four fish have been designated by the U.S. Food and Drug Administration ( USDA ) and Environmental Protection Agency ( EPA ) to be unsafe to eat due to their typically high levels of mercury? Making the “do not eat” list are King Mackerel, Shark, Swordfish and Tilefish.
Don't eat shark, swordfish, king mackerel, or tilefish (sometimes called golden bass or golden snapper) because they contain high levels of mercury. Eat up to 12 ounces (two average meals) a week of a variety of fish and shellfish that are lower in mercury.
Trash fish, also known as rough fish, is a term used to describe fish that is caught accidentally when searching for more popular varieties, like tuna or cod or swordfish, and they're usually discarded by fishermen.
Overall, larger and longer-lived fish tend to contain the most mercury ( 4 ). These include shark, swordfish, fresh tuna, marlin, king mackerel, tilefish from the Gulf of Mexico, and northern pike ( 5 ). Larger fish tend to eat many smaller fish, which contain small amounts of mercury.
Oily fish – such as salmon, mackerel, anchovies, sardines and herring – contain all-important omega-3 essential fatty acid, which is important for heart and brain health as well as mood regulation.
White fish such as hoki or tarakihi has lots of omega-3, and oily fish such as salmon or tuna has even more. We recommend choosing products with 200mg or more omega-3 per 100g.
While they are both excellent sources of protein and add to your nutrient profile, the benefits of fish tend to be slightly higher than chicken, especially when it comes to the Omega-3 content in it.
Worst: Orange Roughy
These fish, also known as slimeheads, can live up to 150 years. But that means they've been around unhealthy elements, like mercury, for a long time. So they're not the best option for a healthy diet.
The Dietary Guidelines for Americans states that to consume those higher amounts, children should only be fed fish from the “Best Choices” list that are even lower in mercury – these fish are anchovies, Atlantic mackerel, catfish, clams, crab, crawfish, flounder, haddock, mullet, oysters, plaice, pollock, salmon, ...
1. Cod. Cod is often considered one of the best white fish and commonly featured in recipes like fish and chips due to its dense, flaky texture. In addition to being relatively low in calories, cod is an excellent source of protein, selenium and vitamin B12.
Fish and shellfish in this category, such as salmon, catfish, tilapia, lobster and scallops, are safe to eat two to three times a week, or 8 to 12 ounces per week, according to the FDA.
Generally speaking, eating salmon every day is not always recommended, unless you eat small amounts. “The 2020–2025 Dietary Guidelines for Americans recommend that people consume 8 to 10 ounces of seafood per week, especially fish that are lower in mercury, which would include salmon,” says Pike.
It's also possible to develop mercury poisoning from eating too much seafood, even if the varieties have lower levels of mercury. The FDA states that in small amounts, certain types of fish with lower mercury levels may be okay for adults to eat once or twice per week.
Smaller fish—sardines, anchovies, farmed trout, fresh tilapia, arctic char—and bivalves such as scallops, clams, and oysters don't build up as many contaminants as do the large carnivores.
Is barramundi healthier than salmon? Salmon and barramundi are both great options as part of a healthy lifestyle! While barramundi has half the calories of Atlantic farmed salmon, both fish are high in omega-3 fatty acids, which play a vital role in brain and heart health.
But is it safe to eat fish every day? “For most individuals it's fine to eat fish every day,” says Eric Rimm, professor of epidemiology and nutrition, in an August 30, 2015 article on Today.com, adding that “it's certainly better to eat fish every day than to eat beef every day.”
The traditional treatment for mercury poisoning is to stop all exposures. In many cases, chelation therapy is also used. This involves giving a medication (the chelator) which goes into the body and grabs the metal (chelos is the Greek word for claw) then carries the metal out of the body, usually into the urine.