What kind of fish is oily fish? Many people mistakenly think that oil fish is squid. In fact, although they have the same pronunciation, they are not the same creature. Do you know what oil fish is? What's the difference between oily fish and COD? Let's have a look
Which is better, oily fish or cod
In comparison, cod is better than oil fish. Cod has few spines, tender meat, high nutritional value and is easy to be digested by the human body. The meat of COD is very delicate. It can be eaten raw with horseradish like salmon. It has a unique fragrance and delicious taste and is very suitable for babies..
Oil fish contains wax ester. Although it is not toxic, it is difficult to be digested by the human body and will accumulate in the rectum. Therefore, some people will have adverse reactions such as diarrhea and gastrointestinal spasm after eating oil fish. People with weak gastrointestinal function, especially children, will have oily diarrhea.
What is the difference between oil fish and COD
1. Shape
The skin of silver cod is white or gray, the color is light, the scale is small, the fish body is extended, the side is flat, cylindrical, the back is dark blue gray or green gray, and the abdomen is gray or light color.
The oil fish has a round lip, a slightly long body, a round front and a flat back. The back of the head is an arc, the upper part of the body is black or cyan black, the abdomen is gray white, each fin is slightly black, and most of the body side scales have black edges. From behind the gill hole to in front of the pectoral fin, the black patches are thick and connected into a large black spot.
2. Scales
Silver cod has small scales, small silver dots on its body and light flesh color; The scales of oil fish do not have this feature. Generally, businesses will peel off the scales of oil fish to confuse them.
3. Feel
It is difficult to distinguish the hand feeling of oil fish and COD after freezing, but after thawing, COD will feel very smooth. After thawing, cod skin is very smooth, like a layer of mucus film; The oil fish is relatively rough. The silver cod is not scaled when sold, but the oil fish are scaled and sold.
4. Flesh color
The skin of COD is white or gray, the color is light, and the meat is fine. The oily fish skin is grayish black, dark in color, grid shaped, hard and rough in meat. The oily fish meat can be found to be yellow when viewed carefully.
5. Price
Cod is an endangered species, fishing is strictly restricted, and its origin is not in China, so its price is high in China; The price of oily fish is generally less than 30 yuan / kg. If the price of COD is lower, it's best not to buy it.
Nutritional value of COD
1. Cod fat contains various amino acids necessary for children's development, the ratio is very close to children's needs, and is easy to be digested and absorbed by the human body. It also contains unsaturated fatty acids, calcium, phosphorus, iron, B vitamins, etc.
2. Cod meat is rich in magnesium, which can protect the cardiovascular system and prevent cardiovascular diseases such as hypertension and myocardial infarction.
3. Natural vitamin D in cod liver oil can help children better absorb calcium, correct calcium deficiency in children, promote bone and height development in children, and promote osteoporosis in the elderly in France.
4. DHA contained in cod is an important part of retina, which can benefit intelligence and promote brain development. Appropriate supplementation of cod liver oil for children and adolescents in the growth and development period can help activate cells and promote brain development.
Who is not fit to eat cod
1. Patients with gout and high uric acid
Cod meat has a high protein content. Patients with gout and high uric acid may increase the disease by eating cod. It has high protein content.
2. Cirrhosis patients and tuberculosis patients
Patients with liver cirrhosis and tuberculosis should avoid eating cod when taking medicine, so as not to aggravate the disease.
3. People allergic to cod
Patients who are allergic to cod will have symptoms of skin pruritus and rash, and even life-threatening in serious cases.
Cod and oil fish are two completely different kinds of fish. Cod contains high nutrients and can supplement nutrition for human body after eating. However, it not only does not have these benefits, but also brings some harm. Therefore, we must identify clearly when buying.