Oil fish. Oil fish and cod are similar in appearance, so it is difficult for non-professionals to distinguish them. In addition, when vendors sell, they usually process it into fish segments and fillets, which is even more difficult for consumers to distinguish. Oil fish is the general name of Agkistrodon acutus and Agkistrodon heteroscales, commonly known as spring fish, and other nicknames include "round snow (cod) fish", "white jade dolphin" and "butter fish". Oil fish is a fish with mackerel family, which is common in tropical and temperate seas all over the world.

Oil fish. Oil fish and cod are similar in appearance, so it is difficult for non-professionals to distinguish them. In addition, when vendors sell, they usually process it into fish segments and fillets, which is even more difficult for consumers to distinguish. Oil fish is the general name of Agkistrodon acutus and Agkistrodon heteroscales, commonly known as spring fish, and other nicknames include "round snow (cod) fish", "white jade dolphin" and "butter fish". Oil fish is a fish with mackerel family, which is common in tropical and temperate seas all over the world. Oil fish is a deep-sea fish. There are more than 40% wax esters in the weight of oil fish. Because the human body can't decompose and absorb wax esters, diarrhea will occur after intestinal stimulation, and orange oil esters will be discharged, but it will not be poisoned. It is understood that oily fish are mostly used for industrial purposes in foreign countries, and many countries do not recommend people to eat oily fish.