Mercury in Fish
Mercury is a heavy metal and neurotoxin that can be present in trace amounts in various foods.
Source: CDC
Fish is a major source of dietary mercury. However, this doesn’t mean you need to cut out fish entirely, as not all types contain high levels of mercury.
Tilefish Tops the List
Some fish varieties, such as shark, tuna, and swordfish, are known to have elevated mercury levels.
Source: Wikimedia
The fish with the highest mercury content, though, is tilefish.
Tasty Yet High-Mercury Choice
Tilefish, found off the east coast of the United States and in the Gulf of Mexico, is a large fish with white flesh and a flavor reminiscent of shellfish like lobster.
Source: KamranAydinov/Freepik
Despite its appealing taste, it’s worth reconsidering before including tilefish in your meal plan due to its high mercury levels.
Mercury Levels Exceed FDA Limits
Some tilefish have mercury concentrations reaching 1.123 parts per million (ppm).
Source: @NahBabyNah/X
This surpasses the FDA’s limit of 1 ppm for fish.
Regional Variations
Mercury levels in tilefish can vary significantly depending on where they are caught.
Source: Freepik
Tilefish from the Gulf of Mexico have notably higher mercury levels compared to those from the Atlantic.
Significant Mercury Level Differences
Specifically, Gulf tilefish average 1.123 ppm of mercury.
Source: Depositphotos
Atlantic tilefish have a much lower average of 0.144 ppm, similar to skipjack tuna.
Opt for Atlantic Tilefish
Therefore, if you choose to eat tilefish, opting for those from the Atlantic is preferable.
Source: iStock
This guidance applies to other fish as well; research indicates that fish from the Gulf of Mexico often contain higher mercury levels compared to those from other regions.
Dangerous Health Risks
It is crucial to be aware of mercury content when selecting fish for consumption, as high mercury levels can pose health risks.
Source: Freepik
Mercury is especially dangerous for pregnant women, as it can lead to birth defects.
Swordfish Ranks High
Tilefish isn’t the only fish with high mercury levels.
Source: mrsiraphol/Freepik
Swordfish also ranks high on the FDA’s list.
Safe Consumption Guidelines
For healthy individuals, occasional consumption of swordfish and tilefish is generally safe.
Source: KamranAydinov/Freepik
Fish with lower mercury levels, like shrimp or haddock, are recommended for consumption up to twice a week.
The Fish to Avoid for Pregnant Women
However, pregnant women should avoid high-mercury fish altogether.
Source: BGStock72/Canva
These include tilefish, shark, and king mackerel.