health
The fish we buy most often isn't as healthy as we think
At first glance, the question 'which is the unhealthiest fish' seems to have a simple answer, but things are actually more complicated. Fish is generally considered a very healthy food, but some species can contain more fat, higher amounts of toxins, or are prepared in a way that makes them less suitable for everyday consumption.

TL;DR
- Fatty fish like salmon, mackerel, and herring are rich in beneficial omega-3 fatty acids but are also higher in calories.
- Large predatory fish such as tuna, swordfish, and shark can accumulate high levels of mercury, making them potentially harmful in large quantities, especially for pregnant women and children.
- The preparation method significantly impacts a fish's healthiness; fried or breaded fish tends to be less healthy than grilled or baked fish.
- The most problematic categories include large predatory fish with high mercury content, industrially processed fish products, and fried fish.
- Most fresh fish, even fatty varieties, remains nutritious and can be part of a balanced diet through wise selection, variety, and mindful preparation.