6 Types Of Fish Species That You Should Eat Little Of

Are you going on holiday to warmer regions this summer? Do you think that fish is always the healthiest choice on the menu? There are certain fish species that have a high fat content that allows mercury to accumulate, and make them a dangerous food for our health.
6 types of fish species that you should eat little of

Fish is one of the healthiest and most tasty foods in the world, making it a logical addition to our regular diet. It is even linked to health, which gives more than enough reason why doctors and nutritionists consider it a recommended food source. However, there are many negative things associated with certain fish species that most people do not know about. One of them is mercury. Read about 6 types of fish species that you should eat little of.

Mercury and fish species that you should eat little of


Over the years , there have been various studies that confirm the presence of heavy metals in fish. Among these heavy metals, methylmercury is one of the largest (organic compound that comes from mercury ). It is a relatively dangerous component for humans when we eat fish that contain high levels of it.

But mercury is not the only thing that can affect human health . There is also another form of harmful substance present in fish fat. They are pollutants that come from the fish’s environment.  Objects such as plastic or strong chemical elements are responsible for contaminating the fish that ends up on the table as a “healthy” dinner.

Furthermore, the human body cannot process elements such as mercury. The metal builds up until it reaches levels that are dangerous to the body.

Risky fish species that you should avoid eating

When we know that there are certain types of toxic fish, we should also know which types of mercury affect the most. We list the most risky fish species below.

Mackerel sturgeon

Mackerel sturgeon

Mackerel sturgeon is one of the most popular fish species in the fishing industry, and there are several different species. Given the danger of mercury, people should not eat mackerel sturgeon regularly.

This warning is especially aimed at children and pregnant women. We should eat this fish a maximum of once a week.


On the list of the world’s most risky fish species that we should avoid eating, we find basa, or pangasius bocourti. It comes from Vietnam, and it has become popular in many restaurants abroad because it is easy to eat.

Because it has no bones, it can be eaten with ease. Like a flounder, you can also eat it as a fillet; however, the base is more economical. Despite its simplicity and price, it  lacks nourishment. First and foremost, the base has a low content of omega-3 fatty acids.

Furthermore, a pesticide called trifluralin contaminates most bases. It is a substance that can be harmful to human health.

Barbed wire

Barbed wire

This fish is one of the most common finds in Spanish cuisine. It is even used as a cheap alternative to swordfish. However, the large size has one major drawback.

Due to its size, the fat ends up with an accumulation of cadmium (a harmful metal) and mercury. Both metals do not have many health benefits to offer, so the best option is to avoid eating it.


Are you going on holiday abroad? Many people eat mackerel regularly. Despite their popularity , the World Health Organization (WHO) declares it a dangerous food.
While Norwegian mackerel is safe to eat, the same does not apply when you travel outside the Nordic region.

This risky fish contains one of the highest amounts of mercury in the meat. With this in mind, the smartest thing is to avoid mackerel, or at least eat it only from time to time.



Another fish that is very common to find on the menu when you are abroad is tilapia. It is without a doubt one of the most common fish species when it comes to fishing, commercially and in cooking. Despite how common it is, it can also be one of the most risky fish species for human health. It gets worse, tilapia is even comparable to lard due to its high fat content. It leads to high cholesterol (LDL), or in other words “bad cholesterol”.

With this in mind, you should aim to eat less tilapia, especially if you have arthritis, asthma or heart disease.


By taking advantage of its larger size, the swordfish feeds on other smaller fish species throughout its life. As a result, it stores large amounts of fat, which can also store high levels of mercury.

Given these high levels, it is best for you to avoid eating swordfish and keep it completely out of your menu.

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