CATDOLL : CATDOLL: What is the difference between yellow eel and green eel?

What is the difference between yellow eel and green eel

1. Different morphological characteristics

1. Morphological characteristics of green eel: The fry of green eel is about 6 cm long and weighs 0.1 gram, but it has a narrow head and a tall, thin and transparent body like a leaf, so it is called "willow leaf fish". It is like a snake, but without scales.

2. Morphological characteristics of the eel: The body is slender and snake-like, about 20-70 cm long and up to 1 meter long. The front of the body is round, the back is flat, and the tail end is thin. The head is long and round. It has a large mouth, an end position, a slightly protruding upper jaw and well-developed lips. There are tiny teeth on the mandible and mouth cover.

The eyes are small and covered by a thin skin. The head is thick and the tail is thin. The body surface mucous membrane is smooth, scaleless, yellowish brown, with irregular black spots on the body surface, the underdeveloped fins are basically gone, and there is only one triangular spine in the body, with little flesh on the spine.

2. Different distribution ranges

1. Distribution range of the green eel: Mainly distributed in the Yangtze River, Minjiang River, Pearl River basins, Hainan Island and rivers and lakes in China.

2. Distribution of Monopterus albus: It is produced in all parts of China, with the largest production in the Yangtze River Basin, Liaoning and Tianjin. It is widely distributed in eastern Asia and nearby islands, from Southeast Asia in the west to the Philippine Islands in the east, from Japan in the north to the East Indies in the south.

3. Different living habits

1. Green eel living habits: like to live in clean, unpolluted waters, and are the purest aquatic organisms in the world. Yellow eels grow in rivers on land, migrate to the sea to lay eggs, lay eggs only once in their lifetime, and die after laying eggs.

2. Living habits of the eel: During the day, it likes to drill holes in the humus mud or dig holes in the cracks of the river bank where there is water. It rarely moves during the day and rarely looks for food at night. It is nocturnal, and the skin folds in its mouth can breathe, so it can breathe air directly.

Reference source: Baidu Encyclopedia - Yellow eel

Reference source: Baidu Encyclopedia - Eel

1. The difference between the family and genus of the green eel and the yellow eel

Green eel: Green eel is a fish belonging to the animal kingdom, phylum chordata, subphylum vertebrata, class bony fishes, subclass actinopterygii, order anguillae, and suborder anguillae.

Eel: Eel is a tropical and warm temperate fish belonging to the animal kingdom, phylum chordata, subphylum vertebrata, class teleosts, subclass actinopterygii, order synbranchidae, family synbranchidae, and genus Monopterus.

2. The difference in appearance between green eel and yellow eel

Green eel: The body length of green eel fry is about 6 cm and weighs 0.1 gram. It has a narrow head and a tall, thin and transparent body like a leaf, so it is called willow leaf fish. Its body fluids are almost the same as seawater, so it can drift long distances with the ocean currents without much effort. The largest adult fish is 45 cm long and weighs 1,600 grams.

Yellow eel: The eel is about 20.70 cm long, with no scales or very small scales. The dorsal and anal fins are very low and continuous around the tail end. The gills usually have only one external gill opening in the throat. The front part is tubular and gradually flattens towards the tail. The tail tip is flat and thin. The whole body is naked and scaleless. It has a large, conical head, a pointed snout, a slender, snake-like body, a round front body and a laterally flattened back body, a pointed tail and a long, round head.

Eel:

Green eel:

3. The difference between the origins of green eel and eel

Green eel: China's eels are mainly distributed in the Yangtze River, Minjiang River, Pearl River basins, Hainan Island, and rivers, lakes and reservoirs. Green eels around the world mainly grow in tropical and temperate waters. Except for European eels and American eels distributed in the Atlantic Ocean, the rest are distributed in the Indian Ocean and Pacific Ocean.

Yellow eel: There are two types of eels, green and yellow. The big ones are two or three feet long. They like quietness and usually lie quietly at the bottom of the water. They live in mud holes and rock crevices by the water. They come out in summer and hide in caves in November and December. They are distributed in Sichuan, Yunnan, Guizhou, Chongqing, Hunan, Hubei, Anhui, Henan and other places.

Reference source: Baidu Encyclopedia - Yellow eel

Reference source: Baidu Encyclopedia - Eel

Rice field eel belongs to the family Syngnathidae, order Syngnathidae, while eel belongs to the family Anguilliformes, order Anguilliformes. There are two common types of eels in China, sea eel and river eel (also called green eel). They can be distinguished by color, eel is silvery white. In appearance, rice field eel has a very pointed tail, while eel does not. Rice field eel is usually found in fields and ponds. Eel is more common in the sea. The two live in different places.

What is the difference between yellowtail eel and unagi?

1. Eel

Alias: white eel, white eel, river eel, eel, green eel, wind bun, Japanese eel.

Eel is the meat or the whole body of the eel, an animal of the Anguilla family. Eel is a fish, similar to a snake, but without scales, and is generally found in the sea area where salt water and fresh water meet. It is mainly distributed in the Yangtze River, Minjiang River, Pearl River Basin, Hainan Island, and rivers and lakes in China.

There are 18 species of eels in the world, of which Taiwan has four families: Japanese eels, perch eels, Celebes eels, and short-finned eels. However, only Japanese eels are the most common, and the other three are rare. They have lived on Earth for tens of millions of years, but we have only known about them for the past few decades. For example, its true spawning ground was not discovered until 1991. Its gender is most controlled by environmental factors and density. When the density is high and food is insufficient, it will become a male fish, otherwise it will become a female fish. In Taiwan's rivers, since there are very few eels, most of them are female fish.

Eel fry cannot be bred artificially, mainly because eels have a very special life history that is difficult to simulate in an artificial environment. Japanese eels grow up in freshwater rivers and begin to migrate to the sea in the summer, that is, swim from rivers to the ocean to lay eggs, which is exactly the opposite of the upstream migration of trout and salmon from the ocean back to rivers to lay eggs. Its spawning ground is thousands of kilometers away in the deep sea between the Philippines and the Malay Islands. Scientists discovered this spawning ground mainly because they caught many of its newly hatched fry here.

The body length of the eel fry is about 6 cm and the weight is 0.1 gram. However, it has a narrow head and a tall, thin and transparent body like a leaf, so it is called "willow leaf fish". Its body fluids are almost the same as seawater, so it can be easily transported over long distances with the ocean current. It takes about half a year for it to drift back from the spawning grounds to the Kuroshio current and then back to the coast of Taiwan. It will only start to metamorphose into a thin and transparent eel line one month before arriving at the shore, also known as "glass fish". Therefore, from December to January every year, fishermen will be busy using hand fork nets to catch eel lines that are about to go upstream on the coast near the estuary and sell them to farmers. After the farmers buy them back and release them, the color will gradually appear, turning into yellow juvenile eels and silver adult eels. Under natural conditions, the largest eel that can be caught is 45 cm and weighs 1,600 grams.

Eels lay their eggs in the deep sea and grow in freshwater. They are ferocious, greedy, active, nocturnal, phototropic, and like flowing water and warmth.

Adult eels grow fast, and their appearance is round and conical, with a dark and slender color. In recent years, they are more often farmed, and their meat is crisp and tender. This fish is common all year round, but it is the most plump and delicious in summer and winter. Eels are rich in nutrition, delicious, with few bones and more meat. They have the effect of cooling down and relieving summer heat, and nourishing and strengthening the body.

There is also the yellow eel, which belongs to the family Synbranchidae and is also a fish. It is also similar to a snake, has no scales, and has a yellow belly, hence the name yellow eel. Yellow eels live in mud caves in ponds or on the banks of freshwater rivers. They cannot survive without water, and when they are caught, they are covered in saliva. Yellow eels are not only a delicious delicacy with tender meat and delicious taste, but also have been known for their nourishing and medicinal effects since ancient times.

Eel is a general term for species belonging to the order Anguilla. Also known as eel, it is a fish that looks like a long snake and has the basic characteristics of fish. In addition, eels have migratory characteristics similar to salmon.

Common species

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European eel (Anguilla anguilla)

American eel (Anguilla rostrata)

Japanese eel (Anguilla japonica)

Australian eel (Anguilla australis)

African eel (Anguilla mossambica)

Anguilla mormorata

Philippine eel (Anguilla mormorata)

New Zealand eel (Anguilla dieffenbachi)

Indonesian eel (Anguilla bicolor Pacifica)

distributed

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Eels around the world mainly grow in tropical and temperate waters. Except for the European eel (Anguilla anguilla) and the American eel (Anguilla rostrata) which are distributed in the Atlantic Ocean, the rest are distributed in the Indian Ocean and the Pacific Ocean.

Life History

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Eels grow in rivers on land, and migrate to the ocean to spawn when they mature. They only lay eggs once in their lifetime and die after spawning. This lifestyle is called catadroumous, which is the opposite of salmon's anadromous migration. Their life history is divided into six different developmental stages. In order to adapt to different environments, their body shape and color change greatly at different stages: Egg stage: Located in deep-sea spawning grounds.

Willow leaf eel (leptocephalus): It drifts long distances in the ocean with the ocean currents. At this time, its body is flat and transparent, as thin as a willow leaf, making it easy to drift with the current.

Glass eel: When approaching coastal waters, its body transforms into a streamlined shape to reduce drag and escape strong ocean currents.

Elvers: When entering estuary waters, melanin begins to appear, and they also become a source of catch for eel fry in the aquaculture industry.

Yellow eel: During its growth period in rivers, the belly of the fish turns yellow.

Silver eel: When mature, the body turns silvery white, similar to deep-sea fish, while the eyes become larger and the pectoral fins widen to adapt to the deep sea to spawn.

The sex of eels is determined by the acquired environment. When the population is small, the proportion of female fish will increase, and when the population is large, it will decrease. The overall proportion is conducive to the increase of the population.

Dishes

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Freshwater eels (unagi) and seawater eels (conger eel, anago) are often used in Japanese cuisine. Cantonese and Shanghainese cuisine also often use eels. In Europe, America and other places, European eels and other freshwater eels are eaten. A traditional London dish is jellied eels.

Similar fish species

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The spiny eels and halosaurs of the order Notacanthiformes are also very eel-like.

These deep-sea fish were previously thought to belong to the suborder Albuliformes. The electric eel is not an eel, but is more closely related to a catfish. True eels belong to the order Anguilliformes, a group of bony fish.

other

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The UK is the only country in Europe where hand-cast nets are legal for eel fishing. Hand-cast nets have been used for thousands of years in the River Parrett and the River Severn in the UK.

Classification

Kingdom: Animalia

Phylum: Chordata

Class: Actinopterygii

Order: Anguilliformes

Suborder: Anguilloidei

division:

Anguillidae (freshwater eels)

Heterenchelyidae

Moringuidae

Xenocongridae

Muraenidae

Myrocongridae

Nemichthyoidei

Nemichthyidae

Serrivomeridae

Cyemidae

Suborder Congroidei

Congridae

Muraenesocidae

Nettastomatidae

Nessorhamphidae

Derichthyidae

Ophichthidae

Macrocephenchelyidae

Suborder Synaphobranchoidei

Synaphobranchidae

Simenchelyidae

Dysommidae

2. Eel

Eel (Monopterus albus) belongs to the order Synbranchidae, family Synbranchidae, genus Monopterus. It is also called ricefield eel, W fish, Luo eel, snake fish, and its English name is Ricefield eel.

Any of about 15 species of elongated, eel-like fishes of the order Synbranchiformes. Not related to the true Anguilliformes, but closely related to the order Perciformes. Found in tropical freshwater or brackish waters. About 20.70 cm (8.28 in) long, scaleless or with very small scales, with dorsal and anal fins very low and continuous around the tail, and gills usually with only one external gill opening in the throat. Some species have very small gills themselves, and breathe by oxygen drawn in through the mucous membranes of the throat or intestines. Valued food fish in the East, often kept in ponds or rice fields.

Yellow eel (Monopterus alba): scaleless, can stand upright in shallow water with the front half of the body, breathe with the mouth to the surface, and store air in the mouth and throat, so the throat appears swollen. Widely distributed in southeastern Asia, common freshwater edible fish, found everywhere except the northwest plateau, inhabits ponds, streams, rice fields, etc., often lurking in mud holes or cracks in rocks. Comes out at night to look for food. Reproduction is rather special, as it is female when young, and turns into male after reproduction once. This female-male transformation phenomenon is called sex reversal.

【feature】

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The body is slender and snake-like, with a round front and flat back, and a thin and pointed tail. The head is long and round. The mouth is large and terminal, with a slightly protruding upper jaw and well-developed lips. There are fine teeth on the upper and lower jaws and the mouth bones. The eyes are small and covered with a thin skin. The left and right gill openings merge into one on the ventral side, forming a "V" shape. The gill membrane is connected to the gill septum. There is usually lubricating liquid on the body surface to facilitate escape, and there are no scales. There are no pectoral fins and pelvic fins; the dorsal fin and anal fin are degenerate, leaving only skin folds, without soft spines, and are all connected to the tail fin. When alive, the body is mostly yellowish brown, slightly yellow or orange-yellow, with dark gray spots, and a few eels are white, commonly known as "white eels"

【Habits】

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The eel is a tropical and warm temperate fish. It is a bottom-dwelling fish with strong adaptability and can survive in rivers, lakes, ditches and rice fields. During the day, it likes to burrow in humus-rich mud or live in burrows in rock crevices near water on the embankment. It rarely moves during the day and comes out of its burrows to look for food at night. Its gills are not well developed, but it uses the inner wall of its mouth and throat as an auxiliary organ for breathing, and can breathe air directly; it can survive when the oxygen content in the water is very poor. After leaving the water, as long as the skin is kept moist, it will not die within a few days. The eel is an omnivorous fish that feeds on various small animals. It is greedy and eats most vigorously in summer. It can go without food for a long time in cold seasons without dying.

The reproductive season of the yellow eel is about June to August. In its individual development, it has the characteristics of sex reversal, that is, it is female from the embryonic stage to the first sexual maturity (that is, the gonads of individuals with a body length of less than 35 cm are all ovaries); after spawning, the ovaries gradually become testes; when the body length is 36-48 cm, the sex is partially reversed, and the male and female individuals are almost equal; those that grow to more than 53 cm are mostly testes. When the young fish can only grow to 20 cm, the female fish will reach maturity after 2 winters, with a body length of at least 34 cm. The largest individual can reach 70 cm and weigh 1.5 kg. The yellow eel lays eggs near the entrance of its burrow. Before spawning, it spits out foam from its mouth to form a nest. The fertilized eggs develop on the water surface in the foam with the help of the buoyancy of the foam. Both male and female fish have the habit of protecting the nest.

The eel's body is cylindrical, suitable for cave life, which is very beneficial for entering and exiting the cave and reducing friction. It really has a bit of a "hermit" temperament, with no special attacking skills and no powerful defensive weapons. Its only skill is "36 strategies, escape is the best strategy". It has neither brain fins nor pelvic fins, and even its dorsal and anal fins have degenerated to the point where only a few skin folds are left, and its scales have disappeared to the point where they are difficult to see with the naked eye. However, its entire body can secrete very slippery mucus, and if you are not careful, it can slip away from your hands. The main functions of the mucus on the eel's body are: preventing bacteria and germs from infecting the body and reducing diseases; preventing parasitic animals and plants from entangling it, which is beneficial for its growth; and its slippery surface is beneficial for it to pass through the mud unimpeded.

When the eel embryo develops to the first sexual maturity, it is female, but when it begins the second sexual maturity, it becomes male again. This means that the eel is both a mother and a father in its life. This yin-yang transformation process is called sex reversal in biology.

Most fish breathe through gills, but eels are unique. Their gills have degenerated, and they breathe in air directly through the tiny blood vessels on the surface of their throats. So if we want to keep the eels fresh, we must keep them moist and store them in a cool place.

【distributed】

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Distributed in southeastern Asia, this fish is found in all waters of China except the western plateau. It is also found in western Korea, southern Japan, the Philippines, Java and Myanmar.

【value】

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Yellow eel meat is tender and delicious. It has high nutritional value. Eel is rich in DHA and lecithin, which are the main components of the cell membranes of various organs and tissues of the human body, and are indispensable nutrients for brain cells. According to American experimental research data, regular intake of lecithin can improve memory by 20%. Therefore, eating eel meat has the effect of nourishing the brain and keeping fit. The special substance "eel element" it contains can lower and regulate blood sugar, and has a good therapeutic effect on diabetes. In addition, it contains very little fat, so it is an ideal food for diabetic patients. The amount of vitamin A contained in eel is surprisingly high. Vitamin A can improve vision and promote the metabolism of the skin membrane. Every 100 grams of eel meat contains 17.2-18.8 grams of protein, 0.9-1.2 grams of fat, 38 mg of calcium, 150 mg of phosphorus, and 1.6 mg of iron; in addition, it also contains thiamine (vitamin B1), riboflavin (B2), niacin (vitamin PP), ascorbic acid (vitamin C) and other vitamins. Yellow eel is not only used as a famous dish to entertain guests, but also exported live in recent years and sold well abroad. Frozen eels are also exported to America and other places. Yellow eel is produced all year round, but the ones before and after the Lesser Heat are the most plump. There is a saying among the people that "Yellow eel in Lesser Heat is better than ginseng".

Nutritional analysis

1. Eel is rich in DHA and lecithin, which are the main components of the cell membranes of various organs and tissues in the human body, and are also indispensable nutrients for brain cells;

2. Eel contains eel essence which can lower and regulate blood sugar, and contains very little fat, making it an ideal food for diabetic patients;

3. Eel is rich in vitamin A, which can improve eyesight and promote skin membrane metabolism.

Medicinal

Yellow eel is not only a delicacy, but its meat, blood, head and skin also have certain medicinal value. According to the Compendium of Materia Medica, yellow eel has the effects of nourishing blood, replenishing qi, reducing inflammation, disinfecting and removing rheumatism. Yellow eel meat is sweet and warm in nature, and has the effects of nourishing the middle and replenishing blood, and treating deficiency. It is used as a folk medicine to treat cough due to deficiency, itchy body due to damp heat, intestinal wind hemorrhoids, deafness and other symptoms. Yellow eel head is calcined into ash and taken with warm wine on an empty stomach, which can treat hard and painful breasts in women. Its bones are used as medicine and can also treat ecthyma, with a significant effect. Its blood dripped into the ear can treat chronic suppurative otitis media; dripped into the nose can treat epistaxis (nosebleed); especially when used externally, it can treat facial paralysis and facial nerve paralysis. Some people say that "eel is eye medicine", and people with eye diseases in the past knew that eating eel is good for them. Eating eels regularly has a strong tonic function, especially for people who are weak, sick or have just given birth. Its blood can also treat facial paralysis. Traditional Chinese medicine believes that it has medical and health functions such as replenishing qi and blood, warming yang and strengthening spleen, nourishing liver and kidney, and removing wind and unblocking meridians.

Eel blood is poisonous, but the toxin is not heat-resistant and can be destroyed by gastric juice and heating. Generally, it will not cause poisoning if it is cooked. Whether the folk use of eel blood to treat diseases is due to the effect of toxins in the blood remains to be further studied.

The blood of the eel is poisonous. If accidentally ingested, it will irritate the oral cavity and digestive tract mucosa. In severe cases, it can damage the human nervous system, causing numbness of the limbs, respiratory and circulatory failure and death.

Meridians: Liver; Spleen; Kidney

Chemical components of traditional Chinese medicine: Every 100g of edible part contains 80g of water, 18.8g of protein, 0.9g of fat, 1g of ash, 38mg of calcium, 150mg of phosphorus, and 1.6mg of iron.

Effects: replenish qi and blood; nourish liver and kidney; strengthen bones and tendons; eliminate rheumatism

Indications: asthenia; malnutrition; impotence; low back pain; soreness of waist and knees; wind-cold-heat arthralgia; postpartum stranguria; chronic dysentery with pus and blood; hemorrhoids, fistulas; ecthyma

Ecological environment: It is a bottom-dwelling fish that likes to live in rivers, lakes, ditches and rice fields. It has a sex reversal phenomenon. It is a ferocious carnivorous fish that preys on various small animals.

Harvesting and storage:

To catch eels, you can use fishing, netting, cage catching, dry pond catching, etc. They are mostly eaten fresh or processed into dried fish, canned food, etc.

Prescriptions: ① Increase strength: Bear tendons, tiger bones, angelica, and ginseng in equal parts. Grind into powder, steam large eels with wine, and mash the meat into nine pieces. Take two pieces on an empty stomach every day. ("Ben Jing Feng Yuan" Da Li Wan) ② Treat chronic dysentery, bloody stools: one yellow eel, three qian of brown sugar (fried). Remove the eel's belly and internal organs, roast it on new tiles, grind it with sugar, and swallow it with boiled water. ("Yunnan Traditional Chinese Medicine Prescriptions") ③ Treat internal hemorrhoid bleeding: boil the eel. ("Bian Min Food Therapy")

Contraindications: Patients with deficiency-heat and exogenous diseases should take with caution.

Efficacy classification: tonic medicine; anti-rheumatic medicine

Nature and flavor: sweet; warm

Dosage and Administration: For internal use: Cook and eat 100-250g; or mash the meat into pills; or grind into powder.

For external use: Apply appropriate amount and cut into slices for application.

research

From "Leigong Paozhi Lun".

1. "Supplement to Compendium of Materia Medica": Eels make caves in shallow water in summer, like snakes. They hibernate in winter and come out in summer, so they are suitable for eating.

2. "Shu Materia Medica": "Illustrated Classic" says that the eel is similar to the conger eel but slender, and also like a snake but without scales. It has two colors, green and yellow. It lives in mud caves on the water bank and can be found everywhere.

3. "Compendium of Materia Medica" says: Eels have yellow belly and are called yellow eels. There are also white eels, which are slightly larger and white in color. Both have no scales. The big ones are more than a foot long and are shaped like snakes, but they cannot walk on land. However, they can move the wind.

4. "Compendium of Materia Medica": There are two kinds of eels, yellow and green. The yellow one is commonly known as yellow eel, and the green one is commonly known as rattan eel. Wind eel, sweet and warm, slightly poisonous, good at burrowing deep ponds, can only be found in caves in winter, and can treat malnutrition, dysentery, dampness and wind in the waist, back and feet, five kinds of hemorrhoids, intestinal wind, bleeding, leucorrhea, and genital sores. Pregnant women should avoid it. White eel, which tastes good, but produces phlegm and spermatorrhea.

【Related legends】

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According to legend, some strong men in ancient times were so strong because they often ate eels. In the old days, wandering people were generally called "power pill sellers". In fact, the ancient medical book "Ben Jing Feng Yuan" really has a recipe for "power pills", and one of the main ingredients is eel. Eels are fresh and tender, with few bones and thick meat. Compared with other freshwater fish, they are unique. If cooked properly, they are unforgettable. Summer eels eaten one month before and after the Lesser Heat are the most nutritious and delicious, so there is a saying that "Lesser Heat eels are better than ginseng".

There is a difference. The yellow eel is a bit like a snake and has two mouths, while the eel is shaped like an ordinary fish.

Difference Between Eel and Conger

How much per pound