CATDOLL : CATDOLL: How many species of fish are there in the world?

1. How many species of fish are there in the world?

There are about 20,000 species of fish in the world. Among them, there are 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. Among them, there are about 2,100 species of marine fish. There are about 1,010 species 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 particularly popular. Grass carp is also called grass green. It has a tea yellow body color and 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 silver 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 it is especially 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. It is characterized by tender meat and great freshness, but has many small thorns. Crucian carp is most suitable for making soup. Small crucian carp is suitable for making crispy fish. Black carp, also known as black fin, 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 lung of black carp is the most tender part of the fish body and contains a lot of fat. The famous dish "burned bald lung" is made with black carp lung. It is cooked and eaten hot, and it 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. It is a high-end tonic. Ornamental fish refers to those fish with bright colors or strange shapes that have ornamental value. There are usually three major strains, namely temperate freshwater ornamental fish, tropical freshwater ornamental fish and tropical marine 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 lantern species, the second is angelfish, and the third is dragon fish. Marine 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.

There are about 24,000 species of fish in the world, two-thirds of which live in seawater, and the rest live in freshwater. There are 2,500 species in China... If you don't understand something, please tell me and I can tell you in detail.

There are about 20,000 species of fish in the world, of which about 73 belong to the Cyclostomes, about 800 belong to the Chondrichthyes, and about 20,000 belong to the Osteichthyes.

There are about 26,000 species of fish in the world. Two-thirds of them live in seawater, and the rest live in freshwater. There are 2,500 species in China. There are about 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 about 800 species of freshwater fish in my country. Among them, the Cyprinidae has the most genera and species, with more than 400 species, accounting for about half of all freshwater fish; there are also many genera and species of Siluridae and Cobitidae, with a total of more than 200 species in the two families, accounting for about a quarter of all freshwater fish; other families such as Goby, Channa, Synbranchidae, etc. have a total of more than 200 species, accounting for about a quarter of all freshwater fish.

2. The Shanghai Zoo has been closed for a month. How can the lives of the animals in the zoo be guaranteed?

The first is to reserve food and newly built warehouses. Simply solving the manpower problem is obviously not enough to cope with the special situation of the zoo. Another big problem facing the zoo in a closed state is to solve the food supply of more than 5,000 animals. Shanghai Zoo is located on Hongqiao Road, Changning District, Puxi. After initially receiving a four-day suspension notice, Shanghai Zoo began to stock up in large quantities. Not only the quantity but also the variety must be guaranteed. Bananas, apples, oranges and various seasonal vegetables; in addition to chicken, beef, pork, rabbit meat, and lamb, there are also shrimp, krill, plum fish, spring fish, pomfret, herring and other seafood.

Secondly, point-to-point delivery during the epidemic has allowed the supply of feed to continue. Although suppliers cannot strictly guarantee the delivery time, the quality and quantity of the goods are guaranteed. "Although the prices of feed such as vegetables and meat will fluctuate slightly during special periods, in this case, it is not allowed to be calculated in money. The batching room is full of feed lists for various animals, and daily staff will weigh the feed according to different varieties, put it into the corresponding feed containers, and then deliver it to different animal stations.

The other is the shift in economic interests. Zoo facilities need to be built and maintained, the animals in the zoo need food and rescue, the staff need wages, and the overall operation of the zoo requires huge expenses. However, given the limited financial resources of the local government, the limited special funding is far from enough. Animal performances can indeed bring considerable income to the zoo, and canceling animal performances will undoubtedly bring considerable economic pressure to the zoo.

In addition, it should be noted that the Shanghai Zoo upgraded the red panda exhibition area, taking into account that the red panda's migration area overlaps with the red panda's wild habitat to a certain extent, and the green crane is the smallest of the cranes and is relatively provocative. The small size provides the possibility of harmonious coexistence with the red panda. The zoo has tried to breed cranes and red pandas together, and has achieved initial results. Shanghai is an international metropolis with a high level of social civilization. If the animals in the zoo have nothing to eat and no one to take care of them because of the epidemic, the animals in the zoo will die.

The small animals are still taken care of by the zoo staff. The zoo usually has food in stock, so they will not starve to death all of a sudden. In addition, all sectors of society will also find ways to donate food to the zoo.

Generally, there will be relevant persons in charge who feed the animals regularly. These people will also wear protective clothing. Then, they will conduct nucleic acid tests and measure body temperature of the animals in the zoo every day, and provide these animals with high-quality supplies.

Let the animals move freely in their own space, ensure that their food is sufficient and fresh as much as possible, and play more interactive games with the animals.

3. I have 50,000 catties of black fish in Xiantao for sale. What is the price?

The New Year is coming, and I can sell it at a good price. 25 tons, the wholesale price is 8.9 yuan per catty!

4. Frozen products: Hairtail, Spanish mackerel, black carp, yellow croaker, where is the cheapest place to wholesale in Shenyang? Thank you.

The largest seafood wholesale market in Shenyang is on Beidaying Road. You can take bus No. 259 or No. 115 and get off at the seafood wholesale market station. There are wholesale frozen products such as hairtail, Spanish mackerel, black carp, and yellow croaker, which are the cheapest.