The first reason is that canned herring contains a lot of nutrients, and the second reason is that canned herring doesn't smell very good, but it actually tastes good, just like durian. The third reason is that eating canned herring has become a habit or custom in some areas.

Although canned herring is smelly, it contains a lot of nutrients. After cooking correctly, it tastes unique and delicious. Canned herring originated in Sweden. Before eating canned herring, Swedes will take out the fish and wash it. When the smell disappears, they will put it in bread or eat it with other foods.

Now, Sweden is one of the richest countries in the world, but not hundreds of years ago. Canned herring was born about 300 years ago, when herring was the main food in many European countries. However, due to the lack of cold storage technology, herring is extremely difficult to preserve in hot summer (April to June is the main season for local fishermen to salvage herring every year). In order to save money and because of the lack of salt (salted fish can't be made), fishermen came up with this genius idea: let herring ferment naturally.