CATDOLL : CATDOLL: What freshwater fish?

What are freshwater fish?

Common freshwater fish species!

my country has abundant freshwater fish resources, and with artificial breeding, the market supply is sufficient. Among them, carp, silver carp, grass carp and black carp are the most common, in addition to eels and turtles.

Carp is a kind of fine freshwater fish. Its scales are white with metallic luster, it has a red tail, tender meat and delicious taste. The Yellow River carp is especially popular.

Grass carp is also called grass green, with a tea yellow body color. It is the most productive freshwater fish. This fish is characterized by fast growth, heavy weight, big head and fat meat, but the meat is coarse and of lower quality than carp.

Silver carp is divided into two types: silver carp and bighead carp (commonly known as fathead fish). Silver carp has a white body color, small scales, a large head, fat meat, and delicious taste. The head is the fattest, especially suitable for making casserole fish head.

Crucian carp is also called crucian carp. It has a flat and wide body, a prominent back bulge, and small scales. It is characterized by tender meat and great flavor, but it has many small bones. Crucian carp is most suitable for boiling soup. Small crucian carp is suitable for making crispy fish.

Black carp, also known as blackfin, has a long, cylindrical body, a black spine, a milky white belly, and white, plump flesh. It is one of the freshwater fish with the most tender meat. It contains a lot of fat, especially the meat from the pectoral fin and the head and tail. The black carp's lung is the most tender part of the fish body and contains a lot of fat. The famous dish "Roasted Bald Lung" is made with black carp lungs. It is cooked and eaten hot, and is extremely delicious.

The eel, also known as long fish and yellow eel, has a long and thin body, a thick head and a thin tail, a dark-brown back, a yellow belly, small eyes and no scales. The meat of this fish is extremely tender and delicious, and is regarded as a top-quality fish.

The soft-shelled turtle, also known as the turtle fish, has tender meat and rich nutrition, and is a high-end tonic.

What is freshwater fish?

In a broad sense, fish that can live in fresh water with a salinity of 3/1000 can be called freshwater fish.

In a narrow sense, it refers to fish that have only some stages in their life history, such as "juvenile stage" or "adult stage", or fish that must spend their entire life in fresh water.

There are more than 26,000 known fish species in the world, which is the largest category of vertebrates, accounting for about 48.1% of the total number of vertebrates. Most of them live in the ocean, and there are about 8,600 freshwater fish species. There are nearly 3,000 species of fish in my country, of which about 1,000 are freshwater fish.

There are more than 800 species of freshwater fish in my country. Among them, the Cyprinidae has the most species, with more than 400 species, accounting for about half of all freshwater fish; the Catfish and Cobitidae also have many species, with more than 200 species in total, accounting for about a quarter of all freshwater fish; other families such as Goby, Channa, Synbranchidae, etc. have more than 200 species, accounting for about a quarter of all freshwater fish.

Among the freshwater fish in my country, some species are widely distributed and can be found almost everywhere. For example, grass carp, bream, triangular bream, red-eyed trout (etc.) feed mainly on aquatic plants; silver carp, bighead carp, etc. feed on plankton; omnivorous carp, crucian carp, etc.; others include flower carp, wheatear fish, Da's snakehead, silver carp, mullet, club flower fish, yellow eel, white eel, flower loach, loach, catfish, as well as common ferocious fish such as black snakehead and mandarin fish; in addition, there are mild carnivorous fish such as red carp, Mongolian red carp and black carp.

In addition to the above-mentioned widespread species, there are also many common species in local waters. There are about 90 species of fish in the Heilongjiang River in Northeast my country and its tributaries, including about 50 species of carp fish. Because Heilongjiang is located in the temperate and subarctic zones, it produces many cold-water fish. Common species with greater economic significance include Taimen, Smelt, Ussuri Whitefish, Arctic Grayling, Sturgeon, Dabry's Whitefish, Pike and migratory salmon. In addition, there are also endemic species in the north, such as Asian Smelt, Northern Loach, Heilongjiang Duven, and Variegated Duven.

As the geographical location moves southward, there are more and more temperate fish in rivers, while cold-water fish are gradually decreasing. There are about 70 species of fish in the Liaohe River system, and there are also northern species in its upper reaches; there are about 140 species in the Yellow River system and about 300 species in the Yangtze River system. There are very few cold-water fish in the two. In addition to the common important economic fish such as silver carp, grass carp, bighead carp, bream, bream, bream, red-eyed trout, and mullet, there are also endemic species such as shad.

The upper reaches of the Yellow River and Yangtze River and some rivers in the Northwest Plateau have very special fish species due to the terrain, such as 13 species of schizothorax and 8 species of naked schizothorax. Local endemic species include spotted naked carp, Xinjiang double-lip angler, Chinese saw-barbed barb and white-armored fish.

The Pearl River system is rich in fish resources, with a total of more than 260 species. In addition to species that are widely distributed throughout the country, there are also some special types of fish, such as the genus Pomfret and the genus Silver Pom, and species unique to South China, such as the dace, the striped-necked dace, the straight-mouthed dace, the tang fish, and the South China carp.

The plateau rivers in southwest my country, such as the Yarlung Zangbo River, Nujiang River, Lancang River, and Jinsha River, have fast currents in many sections and average fish resources. For example, the genera of Cyprinidae, such as the genera of Dongpo Cyprinidae and the genera of Dagu, the genera of Flatfin Loach, the genera of Sand Loach, and the genera of Exostoma of the family Cobitidae are the same as those in India, Myanmar, Vietnam, and Thailand. In addition, the genera of Schizothorax, the genera of Naked Schizothorax, and the genera of Basilisk are the same as those in the northwest plateau.

What are the four major freshwater fish in China?

Grass carp, also known as silver carp, is one of the four major freshwater fish in my country, along with black carp, bighead carp and silver carp.

Four major fish

Black carp, grass carp, silver carp and bighead carp.

Black carp is a green fish that is mainly distributed in the plains south of the Yangtze River in my country and is relatively rare in the north of the Yangtze River. It is an important fishery resource in the middle and lower reaches of the Yangtze River and the lakes along the river, and the main breeding object in lakes and ponds. It is one of the "four major carps" in my country's freshwater farming.

Grass carp is commonly known as: grass carp, oily grass carp, grass carp, white grass carp, grass carp, grass root (northeast), mixed, black herring, etc. English name: Grass carp. It inhabits rivers and lakes in plain areas, and generally likes to live in the middle and lower layers of water and nearshore areas with a lot of aquatic plants. It is lively, swims quickly, and often forages in groups. It is a typical herbivorous fish. Grass carp feeds on larvae, algae, etc. during its juvenile stage. Grass carp also eats some meat, such as earthworms and dragonflies. It hibernates in deep waters of mainstreams or lakes. Parents have the habit of upstream migration during the reproductive season. It has been transplanted to many countries in Asia, Europe, America, and Africa. Because of its rapid growth and wide source of feed, it is one of the four major freshwater fishes in China.

Silver carp, also known as white carp, water carp, jumping carp, and silver carp, belongs to the order Cypriniformes, family Cyprinidae, and is one of the four famous carps.

The body is flattened laterally, slightly tall, and spindle-shaped. The back is blue-gray, and the sides and abdomen are white. The pectoral fins do not exceed the base of the pelvic fins. The fins are grayish white. The head is relatively large. The eyes are located very low. The scales are small. The horny ridge in the middle of the abdomen extends from the bottom of the pectoral fins to the anus. The shape is similar to that of the bighead carp. The silver carp is impatient and good at jumping.

Silver carp is sweet, mild, non-toxic, tender and nutritious. It is one of the best fish species suitable for breeding. It is one of the main freshwater farmed fish in my country. It is distributed in major water systems across the country. Silver carp is a large freshwater fish bred artificially. It grows fast, has few diseases and high yields. It is often mixed with grass carp and carp.

Bighead carp is also called: silver carp, fathead fish, Baotou fish, bighead fish, black carp, bighead carp, and male fish. It is a kind of freshwater fish. It has the elegant name of "water scavenger" and is one of the four major carps in China. It looks like silver carp, but its body is flattened. It has a large and wide head, which is about 1/3 of its body length. Its mouth is also wide and slightly upturned. Its eyes are low. Bighead carp grows in freshwater lakes, rivers, reservoirs, and ponds. It is mostly distributed in the middle and upper layers of the water. It is edible and has the effects of improving IQ, memory, and delaying aging.

What is the difference between deep-water fish and fresh-water fish? I really want to know

As we all know, marine fish live their entire lives in the vast ocean, while freshwater fish live their entire lives in freshwater in rivers, lakes and streams. During tens of millions of years of biological evolution, fish have lived and multiplied from generation to generation, creating two major systems living in different waters. Generally speaking, the salt concentration of seawater on Earth is 16-47 (usually 35), while the salt concentration of freshwater is only 0.01-0.5, a huge difference between the two.

Fish have great adaptability to the salinity of the water environment. Various fish can live normally in waters of different salinities. This is related to their perfect physiological regulation mechanism, but the regulation effect is limited to a certain salinity range, otherwise it will affect their survival.

The salt concentration in the body tissues of marine fish is much lower than that in the seawater outside. Since there is a lot of salt in seawater, it has a high specific gravity and density. According to the principle of osmotic pressure, the water power in the body tissues of marine fish will continue to seep out from the gills and body surface. In order to maintain the water balance in the body, marine fish have to swallow a lot of seawater to make up for the water loss in the body. However, due to swallowing large mouthfuls of seawater, the salt entering the fish body has also greatly increased. In this way, in addition to excreting some salt from the kidneys, marine fish mainly rely on the "chloride-secreting cells" in the gill tissue to complete the task of salt excretion. In addition, there are also some marine fish, mainly cartilaginous fish, such as sharks, which store the metabolized nitrogen compounds in the blood in the form of urea, which increases the blood concentration and the osmotic pressure becomes equivalent to that of seawater. In this way, there is no problem of swallowing water and excreting salt.

Freshwater fish are very different from saltwater fish. The salt concentration in the body tissues of freshwater fish is higher than that in the fresh water outside. That is to say, the salt concentration, specific gravity and density of fresh water are low. According to the principle of osmotic pressure, fresh water from the outside will continue to enter the fish body in large quantities. For this reason, freshwater fish can only excrete excess water through the kidneys.

According to the adaptability of fish to salt changes, fish can be divided into two categories: euryhaline and stenohaline. Euryhaline fish can tolerate large changes in salinity. Among ornamental fish, archerfish, bat pomfret, yellowfin pomfret, golden drum, etc. are euryhaline fish. They can live in both fresh water and seawater, which is a unique feature. As for stenohaline fish, they cannot withstand slight changes in salinity. Sudden changes in salinity are often an important cause of death for stenohaline fish. The beautiful coral fish is a stenohaline fish. It can withstand changes in salinity of less than 1, which is why coral fish are beautiful but difficult to raise.

According to the law of survival competition, any organism on earth must try to adapt itself to the surrounding environment in order to survive and continue to reproduce. This is an inevitable law of nature and evolution, but it takes a long time.

The purpose of posting this thread is not only to let everyone know more about the difference between freshwater fish and saltwater fish, but also to let many fish lovers who have only heard of the old three things we often use when raising freshwater fish, heating, adding salt, and changing water, but have only a vague understanding of why we use these three simple, safe and feasible methods, to know the difference between freshwater fish and saltwater fish. This article has a certain extended meaning. Friends who have read and replied to the thread, I wonder if everyone's thoughts have been extended in this direction?

What freshwater fish are the best-selling

Carp or Wuchang fish

What are freshwater fish? Do they live in rivers or the sea? What are the characteristics of freshwater fish?

Freshwater fish are fish that live in freshwater, such as rivers, lakes, ditches, etc. Freshwater fish are smaller than marine fish and have more bones than marine fish. Most freshwater fish have an earthy smell, but they are easy to breed and have high yields.

Which fish are freshwater fish?

Grass carp, silver carp, carp, crucian carp, white fish, bream, these are mixed culture fish, as well as special cultured freshwater fish such as black carp and mandarin fish

What is the largest freshwater fish in China?

The largest freshwater fish is sturgeon, which is usually over 2-3 meters long and weighs 200-400 kilograms. The largest can be up to 7.5 meters long and weigh over 1,000 kilograms. The Amazon anaconda is the largest snake in the world today, up to 10 meters long, weighing over 225 kilograms, and as thick as an adult man's torso; but generally the length of an anaconda is less than 5.5 meters. A giant python 14.85 meters long and weighing 447 kilograms was caught in Indonesia. So far, this python is the largest python in the world.