CATDOLL : CATDOLL: How many types of fish are there?

Question 1: How many kinds of fish are there in the world? There are about 20,000 kinds of fish in the world. Among them, there are about 73 kinds of Cyclostomes, about 800 kinds of Chondrichthyes, and about 20,000 kinds of Osteichthyes. There are about 3,000 kinds of fish in my country. Among them, there are about 2,100 kinds of marine fish. There are about 1,010 kinds of 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, turtles, etc. Carp is a kind of good fish among freshwater fish. Its scales are white with metallic luster, 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. The characteristics of this fish are fast growth, heavy weight, big head and fat meat, but the meat is coarse and the quality is inferior to carp. Silver carp is divided into two types: silver carp and bighead carp (commonly known as fathead fish). Silver carp has a whitish body, small scales, a large head, fat meat, and delicious taste. The head is the fattest, and is particularly suitable for making casserole fish heads. Crucian carp, also known as crucian carp, has a flat and wide body, a prominent back bulge, and small scales. Its characteristics are tender meat and great freshness, but it has many small thorns. 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 and full meat. It is a kind of freshwater fish with tender meat; it contains more fat, especially the meat of a section of the pectoral fin and the meat of the head and tail. The lungs of black carp are the most tender part of the fish body and contain more fat. The famous dish "burned lungs" is made with black carp lungs. It is cooked and eaten hot, and is extremely plump and delicious. 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 turtle, also known as the turtle fish, has tender meat and rich nutrition, and is a high-end tonic. Ornamental fish refers to those fish with bright colors or strange shapes that have ornamental value. Usually there are three major strains, namely temperate freshwater ornamental fish, tropical freshwater ornamental fish and tropical seawater ornamental fish. Temperate freshwater ornamental fish mainly include red crucian carp, Chinese goldfish and Japanese koi. There are three major series of tropical freshwater ornamental fish, one is the lamp variety, the second is angelfish, and the third is dragon fish. Seawater ornamental fish mainly come from the coral reef waters of the Indian Ocean and the Pacific Ocean. There are many varieties and strange colors, with a primitive, simple and mysterious natural beauty.

Question 2: How many species of fish are there in China? According to relevant data, there are about 20,500 species of fish in the world, of which 8,000 species live in warm waters; 1,130 species live in cold seas; 220 species live in the upper ocean zone; and about 8,275 species of freshwater fish live in rivers and lakes.

According to the book "Destination of Chinese Fishes", there are a total of 2,831 species of fish in my country, including more than 800 species of freshwater fish.

Distribution of freshwater fish in my country

my country is one of the countries with the most freshwater surface in the world, with a freshwater area of ​​about 300 million mu, of which about 7,500 mu can be used for fish farming. Most of my country is located in the temperate or subtropical zone, with a mild climate and abundant rainfall, which is suitable for fish growth. There are also breeding technologies for excellent fish such as grass carp, silver carp, bighead carp, silver carp, tilapia, carp, crucian carp, and bighead bream. Therefore, China is the country with the most developed freshwater aquaculture industry in the world today, and it leads the world in both breeding area and total output. Due to the vast geographical area of ​​my country, different geographical and natural environments, fish species and pattern characteristics in different regions, according to the regional classification of climate, the distribution of fish is as follows:

↑ Southeast region: including Guangdong, Guangxi, Yunnan, Guizhou, Fujian, Taiwan and Hainan Island

↑ River plain area: including the middle and lower reaches of the Yangtze River, the lower reaches of the Yellow River and the lower reaches of the Liao River

↑Northern region: Dongtan and other places

↑ Northwest Plateau: including Xinjiang, northern Taiwan, Inner Mongolia, Qinghai, Gansu, Shaanxi, Shanxi, etc.

↑Nulan District: This includes southern Taiwan, Sichuan, and western Yunnan. Nujiang, Lancangjiang, Jinshajiang, and Yarlung Zangbo Rivers

Southeast region: including Guangdong, Guangxi, Yunnan, Guizhou, Fujian, Taiwan and Hainan Island. These areas mainly grow warm-loving fish, with a wide variety of species, including dace, croaker, Chinese mackerel, Dongpo fish, flower loach, wax loach, sand loach, flat-headed flat loach, rock loach, flat-fin loach, small snout fish, long-fin catfish, bearded catfish, eel, yellow eel, fighting fish, climbing perch, etc. The main farmed fish are southern species such as green carp, grass carp, silver carp, bighead carp, dace, group-toed bream, bearded catfish, tilapia, etc.

River plain area: It includes the middle and lower reaches of the Yangtze River, the lower reaches of the Yellow River and the lower reaches of the Liao River. In addition to the river basins, there are many lakes here. It is the main production area of ​​freshwater fish in my country. It is famous for its many natural aquatic fish, including silver carp, grass carp, bighead carp, carp, crucian carp, catfish, bream, bighead carp, black carp, eel, etc. The production of whitebait in Taihu Lake and sturgeon, carp and anchovy in the Yangtze River is very large.

The fish species farmed include silver carp, grass carp, bighead carp, common carp, crucian carp, bighead bream, tilapia and some carp hybrids.

Northern region: This region mainly produces cold-water fish, and natural water bodies are rich in fish of the genera Acipenser, Pike, Taimen, etc., such as salmon, pike, sweetfish, snowfish, red snapper, lamprey, etc. are the unique and representative fish here. In addition to silver carp, grass carp, bighead carp, carp, crucian carp and bighead bream, artificial breeding also raises red trout.

Northwest plateau area: including Xinjiang, northern Taiwan, Inner Mongolia, Qinghai, Gansu, Shaanxi, Shanxi and other places. This is a typical continental climate. Natural water bodies are rich in Chinese bowfish, yellow claw fish, naked carp, etc. Other fish include loach, river loach and other fish. The main breeding is still the same as in other places.

Nulan District: It includes southern Taiwan, Sichuan, and western Yunnan. Nujiang, Lancangjiang, Jinshajiang, and Yarlung Zangbo rivers all flow through here, so fish from the southeastern and northwestern plateau regions coexist here through the rivers, such as dace, Chinese mackerel, Dongpo fish, flat-fin loach, sand loach, striped loach, barracuda, perch, yellow mullet, black snakehead, and Chinese bowfish, forming a mixed fish community in the southeastern and northwestern regions. The main breeding is still green carp, grass carp, silver carp, bighead carp, carp, crucian carp, bighead bream, and carp hybrids that have been bred in large quantities in recent years.

Question 3: How many kinds of fish are there in China? There are about 3,000 kinds of fish in my country. Among them, there are about 2,100 kinds of marine fish. There are about 1,010 kinds of freshwater fish, which are 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, turtles, etc.

Question 4: How many species of fish are there? There are three types of fish in the world today: palateless, cartilaginous, and bony. There are approximately 18,900 species of fish in the world.

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Question 5: How many species of fish are there? About 2,000 species have been discovered, and they are the most primitive and lowest group in the vertebrate subphylum. Fish meat is rich in animal protein and phosphorus, rich in nutrition, delicious, easy to digest and absorb by the human body, and plays a major role in the development of human physical and intellectual strength. Other parts of the fish can be made into cod liver oil, fish glue, fish meal, etc. Some fish, such as goldfish and tropical fish, have various shapes and bright colors, and have high ornamental value. Fishing is a sport that is beneficial to physical and mental health and is loved by people all over the world. In addition, some fish, such as mosquito fish, are beneficial to human health in eliminating infectious agents such as malaria and yellow fever. Classification Fish are generally divided into two categories: jawless and jawed. The spine of jawless fish is cylindrical, exists for life, and has no upper and lower jaws. The gills originating from the endoderm are sac-shaped, so they are also called sac branchial fish; the brain is well-developed, generally with 10 pairs of cranial nerves; there are paired visual and auditory organs. The inner ear has 1 or 2 semicircular canals. It has a heart and red blood; its epidermis is composed of multiple layers of cells. Its paired fins are not fully developed, and some ancient bony fish have pectoral fins. There are different classifications of jawless fish, which are generally divided into: Hagfish, Cephalopoda, Lamprey, and Ray-Tailed. Jawed fish have upper and lower jaws. Most have pectoral and pelvic fins; their internal skeleton is well developed, and the notochord of adults is degenerate, with a spine, and rarely a bony exoskeleton. The inner ear has 3 semicircular canals. The gills are formed by ectodermal tissue. It is composed of Placoderms, Chondrichthyes, Acanthidae, and Osteichthyes. Among them, Placoderms and Acanthidae have only fossil species. They are distributed all over the world, mainly inhabiting low-latitude seas, and some species inhabit fresh water. The existing species belong to the subclasses of Elasmobranchia and Holocephalidae. There are about 600 species of Elasmobranchia, about 180 species in China, mostly in the South China Sea. There are 3 families, 6 genera, and about 30 species in Holocephalidae, and about 2 families, 3 genera, and about 5 species in China. The skeleton of the class Osteichthyes is ossified and has sutures. The head is often covered with membrane bones and the body is covered with hard or bony scales. It is the most prosperous branch of living fishes and can be divided into three subclasses: lophis, lungfishes and ray-finned fishes. The ray-finned fishes are the largest group. Among them, the Perciformes has the most species. Except for the Cypriniformes distributed in freshwater and the Salmoniformes which are mostly anadromous fishes, the other orders are mainly distributed in the ocean. In today's world fishery production, the output of the Herringiformes and Gaddiformes is the highest, followed by cod. The output of the two is close to half of the total world fishery output that year. There are more than 2,000 species of bony fish in China's coastal waters and more than 700 species of freshwater bony fish. Fish body structure and life activities Although fish are the lowest vertebrates, they have skeletons, muscles, digestion, circulation, respiration, excretion, reproduction, nerve sensation and other fairly complete organ systems, and can carry out extremely diverse life activities. In addition to being related to system development, its morphological structure also reflects its adaptability to the water environment. External morphology and movement The adaptability of fish body shape to its living environment is mainly manifested in the following aspects: fish living in the upper layer of water are generally spindle-shaped, fish living on the seabed are flat, coral reef fish are mostly laterally flattened, and those living in the water are cylindrical. Some fish living in seaweed have a mimicry body shape, and tuna has a torpedo-shaped body shape, which is suitable for fast swimming. The movement of fish mainly relies on the alternating contraction of muscles arranged in segments on both sides of the body, so that the body and tail fin swing left and right to move forward, and the other fins play a role in balance and steering. After metamorphosis, the fins of some fish also have the functions of attack, self-defense, feeding, reproduction, vocalization, crawling, gliding, jumping, climbing, breathing, etc. The swim bladder can adjust the specific gravity of the fish body and help it float and sink. Skin, scales and body color The skin of fish consists of two parts: epidermis and dermis. The epidermis is composed of several layers of living cells, and mucus cells are distributed between them to reduce friction and protect the body. Pearl stars are the product of local epidermal cell keratinization and are related to reproductive activities. The poison glands and light-emitting organs of a few fish are derivatives of the epidermis. Fish scales are divided into shield scales, hard scales and bone scales. The scales of cartilaginous fish are called shield scales. Hard scales and bone scales are usually produced from the dermis. The bone scales are arranged in a shingle-like manner to facilitate movement and protect the fish body. The scales of many fast-swimming and lurking fish often degenerate or disappear. The body color of fish is often dark on the back and light on the abdomen, which is a protective color adapted to the environment. However, fish living in coral reefs often have bright colors and patterns, which are generally divided into protective colors and warning colors. Skeletal and muscular fish have developed axial and appendicular skeletons, which play an important role in protecting the central nervous system, sensory organs and internal organs, supporting body drive and the activities of the entire body. The axial skeleton is composed of the skull (thoracic skull and pharyngeal skull) and the spine. The pharyngeal skull is a group of bones surrounding the front end of the digestive tract, used to support the mouth and gills. The spine is composed of many vertebrae. The smooth muscle and cardiac muscle of fish are not much different from those of higher animals, but...>>

Question 6: How many species of fish are known in China? There are 3,862 known species of fish in my country, and 19,056 known species in the world, accounting for 20% of the world.

Question 7: How many kinds of fish are there in the world? There are about 20,000 kinds of fish in the world, including about 73 species of Cyclostomes, about 800 species of Chondrichthyes, and about 20,000 species of Osteichthyes.

There are about 3,000 species of fish in my country, of which about 2,100 are marine fish and about 1,010 are freshwater fish.

Question 8: What kinds of rare fish are there in my country? The contents of the PLSCES of the fish class in my country's Wildlife Protection Law are as follows:

PERCIFORMES

Sciaenidae

Yellow-lipped fish Bahaba taipingensis Ⅱ

SCORPAENIFORMES

Cottidae

Songjiang perch Trachidermus fasciatus Ⅱ

GASTEROSTEIFORMES

Syngnathidae

Hippocampus kelloggi Ⅱ

CYPRINIFORMES

Catostomidae

Myxocyprinus asiaticus Ⅱ

Cyprinidae

Tanichthys albonubes Ⅱ

Cyprinus pellegrini Ⅱ

Sinocyclocheilus grahami grahami Ⅱ

Aspiorhynchus laticeps Ⅰ

Schizothorax taliensis Ⅱ

ANGUILLIFOMES

Anguillidae

Anguilla marmorata Ⅱ

SALMONIFORMES

Salmonidae

Sichuan Taimen Hucho bleekeri Ⅱ

Brachymystax lenok tsinlingensis Ⅱ

ACIPENSERIFORMES

Acipenseridae

Acipenser sinensis Ⅰ

Acipenser dabryanus Ⅰ

Polyodontidae

White sturgeon Psephurus gladius Ⅰ

A total of 7 orders, 9 families and 15 species

Question 9: How many species of grass carp are there? 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, there are eels, turtles, etc. Carp is a kind of fine fish among freshwater fish. Its scales are white with metallic luster, red tail, tender meat, and delicious taste. The Yellow River carp is particularly popular. Grass carp is also called grass green. Its body color is tea yellow. It is the most produced freshwater fish. This fish is characterized by fast growth, heavy weight, big head and fat meat, but the meat is coarse and the quality is inferior to carp. Silver carp is divided into two types: silver carp and bighead carp (commonly known as fathead fish). Silver carp has a whitish body color, small scales, a large head, fat meat, delicious taste, and the fattest head, which is especially suitable for making casserole fish head. Crucian carp, also known as crucian melon, has a flat and wide body, a prominent back bulge, and small scales. It is characterized by tender meat and great flavor, but has many small thorns. Crucian carp is most suitable for boiling soup. Small crucian carp is suitable for making crispy fish. Black carp, also known as black fin, has a long body and is cylindrical. Its spine is black, its belly is milky white, and its meat is white and full. It is a kind of freshwater fish with tender meat. It contains more fat, especially the pectoral fin and tail are fat, such as braised "water" and braised head and tail, which are made of a section of meat from the pectoral fin of black carp and the head and tail. The lung of black carp is the most tender part of the fish and contains a lot of fat. The famous dish "burned bald lung" is made with black carp lung. It is very delicious when cooked and hot. 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.

Question 10: How many kinds of fish are there in the world's seabed? According to a survey, there are currently 21,723 species of fish, of which about 12,000 are marine fish. There are 3,187 species of marine fish in China. The most common classification of these fish is to divide them into three classes. The first is the Cyclostomata, which is the most primitive fish, without upper and lower jaws, so it is also called jawless. The body surface is slender and eel-shaped, and the skeleton is completely cartilaginous. There are no paired fins, no shoulder girdle and waist belt, the notochord exists throughout life, and there are no vertebrae. It has a single unpaired nostril, and the gills formed by the endoderm are in the muscle capsule and open to the outside of the body. The second is the Chondrichthyes. The internal skeleton is completely bone, but it is often reinforced by calcification, and there is no true bone tissue: the body surface is covered with shield scales, spines or thorns. There are no scales. The skull has no sutures. There are gill slits on each side of the head, which open to the outside of the body. The intestine is short and has spiral valves inside. There is no fat. The male has a specialized copulatory organ on the inner side of the pelvic fin, called a fin foot. Internal fertilization is performed. Oviparous, ovoviviparous or viviparous, with a crooked tail. Chondrichthyes are widely distributed in the ocean, but mainly in low-latitude waters. The third is the Osteichthyes. It is the most advanced class of fish and is also the most prosperous class at present. The internal skeleton is ossified, the head is often covered with membrane bones, and the skeleton has sutures. The body surface is covered with hard scales or bony scales, or the body is not scaled. There is a pair of external gill openings, the gill septum is degenerate, the gill filaments are supported by two rows of gill rays, usually with fat, the fin rays are mostly segmented, and there are no spiral valves in the intestine. Some fish have dorsal and ventral ribs, and the otoliths are solid. Generally, fertilization is performed externally, and there is no cloaca. There are about 18,000 known species of bony fish in the world. The body types of marine fish can generally be divided into: ① Torpedo type. Fish of this type live in the middle waters and are best at swimming, such as mackerel, mullet, tuna, etc. ② Arrow type. Similar to the torpedo type, but the body is more elongated, the odd fin is moved back, and it lives in the surface water and is good at swimming, such as dogfish, needlefish, etc. ③ Laterally flattened type. Fish of this type have an increased dorsal-ventral axis height and extremely flat left and right sides. They can be divided into spotted fish type, sunfish type and flatfish type, which live near the bottom and bottom respectively. ④ Snake type. Fish of this type have a slender body and a nearly circular cross section. They generally live in the vegetation on the seabed, such as eels and sea dragons. ⑤ Ribbon type. The body is highly elongated and laterally flattened, and is not good at swimming, such as hairtail and oarfish. ⑥ Ball type. Fish of this type have a nearly spherical body and an underdeveloped tail fin, such as boxfish and some round-finned fish, ⑦ Longitudinally flattened type. The dorsal-ventral axis of this type of fish is highly reduced and the body is flat, such as various rays and carps. The fins of fish are the main organs of movement and balance. Paired fins are called even fins, including pectoral fins and pelvic fins; unpaired fins are called odd fins, including dorsal fins, anal fins and caudal fins. The caudal fin is born at the end of the fish's tail and has functions such as steering and propulsion. It is generally divided into round tails (upper and lower lobes are equal in size, such as mackerel, tuna, etc.), crooked tails (upper lobe is more developed than the lower lobe, which helps upward movement, such as sharks), and normal tails (lower lobe is more developed than the upper lobe, which helps downward movement, such as flying fish). There are three ways for fish to reproduce, namely oviparous, ovoviviparous and viviparous. The vast majority of fish are oviparous. Oviparous fish generally release mature eggs directly into the water for external fertilization and complete the entire development process, but there are also a few fish (such as some sharks) that are fertilized internally and the fertilized eggs still develop externally. Ovoviviparous fish generally have eggs fertilized in the body, and the fertilized eggs develop in the body, but the nutrition of the embryo depends on its own yolk supply, which has nothing to do with the mother, such as the white-spotted star shark, the white-spotted dogfish, the Japanese slender shark, the pressure-type plowfish, the sea crucian carp and the black (fish king) fish. Viviparous fish generally have eggs fertilized and developed in the mother's body. The embryo formed by the fertilized egg has a blood circulation connection with the mother. Its nutrition comes not only from the yolk of the body, but also from the mother, such as the gray star shark. The spawning volume of fish is much higher than that of terrestrial vertebrates, and the number of eggs laid varies greatly from species to species, such as from a few large eggs (such as many sharks) to 300 million floating eggs (such as sunfish). Generally, fish that do not protect their eggs after spawning have a large spawning volume, such as the red sea bream, which lays about 1 million eggs, and the eel, which lays 7 to 15 million eggs; fish that protect their eggs after spawning have a smaller spawning volume, such as the seahorse, which lays dozens to hundreds of eggs. The growth rate and size of fish at different stages are very different. Studies have shown that the smallest fish is the micro goby, which is only 7.5-11.5 mm long; the largest can reach 20 meters, such as the whale shark. The fastest growth period of fish is usually before sexual maturity. After that, most of the food consumed by fish is used for the maturation of sexual products and the storage of fat, and only a small part is used for length growth,...>>