Are cod and oily fish a kind of fish? How to distinguish them?

Family difference: cod is a cod-like, oily fish is Cypriniformes Cyprinidae spring water fish in the genus. Size differences: cod size, body length can reach 80 cm, oily fish size is very small. Color difference: cod back is dark gray or green gray, the belly is white. The back of the oily fish is black or black-blue, while the abdomen is gray-white. Use difference: cod is a famous food, oily fish is more industrial value, can be used to extract industrial lubricants.

1. Are cod and oily fish a kind of fish

Both cod and oily fish are fish that we can see in our daily life.When they see these two kinds of fish, many people will confuse them because they are similar in appearance.And, oily fish still has another name to call "round cod", "imitate cod fish", also can see cod and oily fish are very similar from these names.In real life, some sellers do sell oily fish as cod, because cod is more valuable.However, cod and oily fish are not the same kind of fish, the difference between the two is relatively large, can not be confused.In fact, it is relatively easy to distinguish between them, which can be carried out in many ways.

2. cod and oil fish how to distinguish

1, family and genus difference: cod and oil fish are not the same kind, so the category is different.Specifically, cod refers to fish in the order Gadiformes, but oily fish refers to fish in the genus Cyprinidae, Cypriniformes.Both belong to different purposes, so the difference is very big.

2. Difference in body size: There is a big difference in body size between cod and oily fish.The size of oily fish is relatively small, and the larger individuals after adulthood are only about 20 centimeters, while the smaller ones are only 5-10 centimeters.However, the size of cod is relatively large, and the larger cod can reach about 80 centimeters in length when they grow up.

3, color difference: cod and oily fish color is also different.Cod is dark grey or greenish grey on the back and white on the underparts; But the back of the oily fish is black or black and blue, and the belly is gray and white.

4. Price difference: As mentioned above, some sellers will sell oily fish as cod, precisely because the price of cod is high, while the price of oily fish is relatively low.

5. Value difference: The main value of cod and oily fish is different.Cod is a very famous ingredient, the main value is edible value.But the value of oily fish is industrial value, they are used to extract industrial lubricant effect is very good, it is not recommended to eat.

。