Cod has less thorns and more meat, and is rich in nutrition. It is very convenient to buy in supermarkets, so it has been welcomed by many people. The cod sold in the supermarket may be real, or it may be copied from other cheap but similar carp.

Cod mainly grows in the Atlantic Ocean, mainly in Norway, Russia and other places, with low yield, high protein content, good nutrition and high price. It is precisely because of the high price of real cod that some merchants will sell other fish with tender meat and less thorns as cod, but the actual price of this kind of fish is very cheap, which can be doubled by pretending to be cod to sell Jiahe.

In addition, the cod sold in supermarkets are all about 200 to 500 grams of cod fillets. People can't see the most distinctive fish heads, so it is difficult to distinguish between true and false cod, so it is more likely to buy fake cod in supermarkets.