Which is better, the sea eel or the river eel? How to distinguish river eel from sea eel

Eel is the general name of river eel, sea eel and eel, but the nutritional value of river eel and sea eel is different. So, which is better, the sea eel or the river eel? How to distinguish river eel from sea eel?

Eels or river eels, among which delicious eels are collectively called eels, which are divided into river eels and sea eels, and are valuable edible fish with high nutritional value. Eel is rich in fat and carbohydrate, ranking first among all fish. Eel, also called eel and snake fish, is characterized by high fat content and high cholesterol content. Compared with river eel, the fat content and cholesterol content of sea eel are much lower.

How to distinguish the characteristics of river eel from sea eel

1. Appearance: slender figure, cylindrical front, medium-sized head, small eyes, sharp and flat mouth, lower jaw slightly longer than upper jaw, two stools and plough bones, only fine teeth.

2, fish scales: fish scales are very small, buried under the skin, arranged in a pattern.

3. Fin: The dorsal fin begins at the back of the head, and it is connected with the dorsal fin, the anal fin and the caudal fin, and has a pectoral fin, which is small and round and has no ventral fin.

4, color: gray-black back, white abdomen.

Characteristics of sea eel

1. Appearance: long, nearly cylindrical, flat back end, long and sharp head, big mouth and eyes, sharp canine teeth at the front of the upper and lower jaws, and the upper jaw is slightly longer than the lower jaw.

2, fish scales: the body has no scales and has a lateral line.

3. Fin: The dorsal fin starts above the gill, the gluteal fin is connected with the caudal fin, the pectoral fin is wide and there is no ventral fin.

4. Color: dark gray on the back and gray on the abdomen.

The nutritional value of eels The nutritional value of eels is very high, so they are called soft gold in water and have the reputation of "ginseng in water". In China and many parts of the world, it has been regarded as a tonic and beauty product since ancient times.

Eels are rich in nutrition. Fresh eels contain minerals such as water, protein, lipids, sugars, ash, vitamins A, D and E, calcium, phosphorus, iron, sodium and potassium, and unsaturated fatty acid DHA/EPA. Compared with other animal foods, the contents of vitamin A, vitamin E and polyunsaturated fatty acids in eel fat are higher. Eel meat is rich in high-quality protein and a variety of essential amino acids. Its brain, ovary and spinal cord contain cephalin, lecithin and cholesterol.

1, EPA and DHA

Scientific research shows that eel is one of the fish with the highest contents of EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid). DHA and EPA, commonly known as "brain gold", can not only reduce blood fat, resist arteriosclerosis and thrombosis, but also supplement essential nutrition for the brain. DHA can promote the brain development of children and adolescents, enhance memory, and help the elderly to prevent brain function decline and Alzheimer's disease.

DHA and EPA have been proved to play an important role in preventing cardiovascular diseases.

2. Fish oil and vegetable oil

Medical experts also found that eel has beneficial components of fish oil and vegetable oil, and is an ideal food to supplement essential fatty acids and amino acids.

3. Zinc, polyunsaturated fatty acids and vitamin E.

The content of zinc, polyunsaturated fatty acids and vitamin E in eel is very high, which can prevent aging and arteriosclerosis, thus having the effect of skin care and beauty. It is a natural and efficient beauty dish for ladies.

4. vitamin a

It is worth mentioning that river eel is rich in antioxidant nutrients, such as vitamin A. Every100g eel contains nearly 2,500 international units (IU), which is 50% of the recommended daily intake of vitamin A for adults in China. The content of vitamin A is 60 times that of common fish, 100 times that of beef and more than 300 times that of pork. Vitamin A is an excellent food for night blindness patients.

5. Tocopherol

The vitamin E content of eel is 9 times that of common fish. Vitamin E, also known as tocopherol, has the functions of anti-oxidation, anti-cancer, delaying aging, moistening skin, reducing wrinkles and regulating endocrine. , so it is the favorite of girls who love beauty.

6. Calcium

Eel is a kind of aquatic product rich in calcium. Regular consumption can increase blood calcium and make the body strong.

Eel spine has almost everything needed for a perfect calcium source, which is highly praised by scientists at home and abroad, and is recognized as "ideal natural biological calcium source" and "natural supplier of human calcium". The ratio of calcium and phosphorus in eel spine is close to 2: 1, which is naturally consistent with breast milk. It is internationally recognized as the best calcium absorption ratio and has high bioavailability.

7.collagen

The skin and meat of eels are rich in collagen. Collagen can have the function of beauty beauty, moisturize the skin and delay aging, so it is called "edible cosmetics".

8. phospholipids

Phospholipids contained in eels are indispensable nutrients for brain cells. Phospholipids play an important role in the growth and development of some tissues and organs of human body.

9. Xihe Locke protein

Eel contains very rare Xihe Locke protein, which has a good effect of strengthening essence and tonifying kidney, and is a health food for young couples and middle-aged and elderly people.

10, vitamin B 1

Eel is rich in vitamin B 1, also known as thiamine or anti-neuritis. Lack of vitamin B 1 can lead to various neuroinflammations such as beriberi.

Eels have grown up.

1 1, vitamin B2

Eels are rich in vitamin B2, also called riboflavin. Without it, angular stomatitis, cheilitis, conjunctivitis and bursitis will occur.

12, nicotinic acid

Eel is rich in nicotinic acid, also known as vitamin B3 or vitamin PP, which can resist pellagra, dilate blood vessels, promote blood circulation and lower blood pressure.

13, magnesium

Eel contains magnesium, which can maintain bone health and nervous system function and prevent cardiovascular diseases.

14, phosphorus

Eel contains phosphorus, which can maintain bone health, nervous system function and regulate blood pressure.

15, selenium

Eel contains selenium, which can improve immunity, resist oxidation, delay aging, prevent cancer, protect eyes and maintain normal functions of heart and liver.

16, vitamins and minerals

It can provide nutrition for human growth and maintenance of life. Long-term consumption of eel is very helpful to enhance physical fitness, vitality and beauty, especially for pregnant women and infants.