It can also be called flounder.

About 600 species of oval flat fish in the order Haliotis, also known as sea otter fish and Tamara fish. Found in tropical to cold zone waters, most of them are marine products, living in the seawater of moderate depth along the continental shelf, but some of them enter or live permanently in fresh water. Carnivorous, benthic, lying on his side at rest, part of his body is often buried in sand. Some can change the color of the body with the color of the environment. One of the most striking features of flounder is that its eyes are completely on one side of its head; Another feature is the color of the body. The side with eyes (the top at rest) is colored, but the side without eyes below is white. Other features are long dorsal fin and gluteal fin along the dorsal abdominal edge. There are 100 species of flatfishes, with two eyes on the right. There are about 200 species of Bodeko, and both eyes are on the left side of the body. The other main families are the sole family and the sole family. Flounder comes in different sizes, the smallest species is only about 10 cm (4 inches) long, while the largest Atlantic flounder (Hippoglossus hippoglossus) can be as long as 2 meters (7 feet) and weigh 325 kilograms (720 pounds). Many species, such as halibut and turbot, are precious food fish.

Flounder-"chameleon" is a strange fish with two eyes on one side. It is thought that two fish should walk side by side, so it is named flounder. It is a large class of marine fish, including catfish, sole family and sole family. PARALICHTHYS olivaceus, PARALICHTHYS olivaceus and PARALICHTHYS olivaceus are common fish in the family PARALICHTHYS olivaceus. Common halibut families include halibut, halibut, halibut, halibut and halibut. "Cynoglossus" is common in Cynoglossus. There are 3 suborders, 9 families, about 1 18 genera, 538 species. There are 3 suborders, 8 families, 50 genera 134 species in China. They are all bottom marine fish, and their distribution is closely related to the environment, such as ocean current, water and water temperature. For example, in the west side of the equatorial ocean, the warm current is very wide and there are many kinds; There is a strong cold current along the coast of the Yellow Sea and Bohai Sea, and there are many types of cold and warm. The western Pacific and the South China Sea were not strongly affected by the ice age, and there were many kinds. There are a few species in China, such as Silurus meridionalis, Cynoglossus altissima and Cynoglossus punctatus, which can live in fresh water areas of rivers.

Flatfish, also known as sole fish, lives on the sandy bottom of shallow sea and preys on small fish and shrimp. They are especially suitable for benthic organisms on the sea floor. Because their bodies are flat. Both eyes are on the upward side of the body, and the color of this side matches well with the surrounding environment; Their downward side is white. Flatfish has extremely fine scales on its body surface. The flounder has only one dorsal fin, extending almost from the head to the caudal fin. They mainly live in temperate waters and are important economic fish in temperate waters. How do flounder eyes get together? It was found that the flounder larvae just hatched from the egg membrane were completely different from their parents and looked very similar to ordinary fish. Eyes are on both sides of the head. One on each side, placed symmetrically. They live in the upper layer of water and often swim near their sleeping places. After about 20 days, the morphology of PARALICHTHYS olivaceus began to change. When the larvae of flounder reached 1 cm, something strange happened. The eye on one side of the flounder began to move. It gradually moves to the opposite side through the upper edge of the head until it is close to the other eye. Different kinds of flounder eyes have different moving methods and routes. The skull of a flounder is made of cartilage. When the flounder's eyes start to move, the cartilage between the flounder's eyes is first absorbed by the body. In this way, there is no obstacle to the movement of the eyes. The movement of flounder eyes changes the internal structure and organs of flounder. The flounder has not adapted to floating life, so it has to lie on the bottom of the sea. Flounder is a kind of precious seafood. It is called PARALICHTHYS olivaceus in fishery. The body length of flounder is generally 25 cm to 50 cm, and the largest flounder is 70 cm. Paralichthys olivaceus will migrate in short groups according to the changes of seasons. Paralichthys olivaceus is widely distributed along the coast of China. Fishermen in the Yellow Sea and Bohai Sea use bottom trawls to catch flounder. Fresh PARALICHTHYS olivaceus can be eaten or canned. The liver of PARALICHTHYS olivaceus can also extract cod liver oil.

Flounder classification

Flounder, also known as flounder, flounder and fish, lives on the sandy bottom of shallow sea and preys on small fish and shrimp. They are especially suitable for benthic organisms on the sea floor. Because their bodies are flat. Both eyes are on the upward side of the body, and the color of this side matches well with the surrounding environment; Their downward side is white. Flatfish has extremely fine scales on its body surface. The flounder has only one dorsal fin, extending almost from the head to the caudal fin. They mainly live in temperate waters and are important economic fish in temperate waters. How do flounder eyes get together? It was found that the flounder larvae just hatched from the egg membrane were completely different from their parents and looked very similar to ordinary fish. Eyes are on both sides of the head. One on each side, placed symmetrically. They live in the upper layer of water and often swim near the surface. After about 20 days, the morphology of PARALICHTHYS olivaceus began to change. When the larvae of flounder reached 1 cm, something strange happened. The eye on one side of the flounder began to move. It gradually moves to the opposite side through the upper edge of the head until it is close to the other eye. Different kinds of flounder eyes have different moving methods and routes. The skull of a flounder is made of cartilage. When the flounder's eyes start to move, the cartilage between the flounder's eyes is first absorbed by the body. In this way, there is no obstacle to the movement of the eyes. The movement of flounder eyes changes the internal structure and organs of flounder. The flounder has not adapted to floating life, so it has to lie on the bottom of the sea. Flounder is a kind of precious seafood. It is called PARALICHTHYS olivaceus in fishery. The body length of flounder is generally 25 cm to 50 cm, and the largest flounder is 70 cm. Paralichthys olivaceus will migrate in short groups according to the changes of seasons. Paralichthys olivaceus is widely distributed along the coast of China. Fishermen in the Yellow Sea and Bohai Sea use bottom trawls to catch flounder. Fresh PARALICHTHYS olivaceus can be eaten or canned. The liver of PARALICHTHYS olivaceus can also extract cod liver oil.

Ichthyologists tell us that this strange shape of flounder is not innate. The newly hatched flounder also has eyes on both sides. When it grows to about 3 cm, its eyes begin to "move", one eye moves above the head, and gradually the upper edge of the head moves to the other side until it is close to the other eye. The life habits of flounder are very interesting. When swimming in the water, it doesn't have its back up like other fish, but its side with eyes is up and it swims sideways. It often lies flat on the bottom of the sea, covered with a layer of sand, and only two eyes are exposed to wait for prey and avoid predation. In this way, the advantages of two eyes on one side are displayed, which is of course the result of animal evolution and natural selection.

Ancient records

In fact, the ancients' understanding of flounder was wrong. "Erya Dish" said: "The eye of the East has contrast, but it is not better than it, hence the name sole." "Wu Du Fu" also said: "Double eyes, film than Wang Yu." (Note: "The flounder comes from the East China Sea. Wang Yuyu, his body is half. As the saying goes, the silver carp of the King of Yue is inexhaustible, so it is half abandoned in water for fish, so there is no one, so it is called king. " The ancients called it "flounder" because it "looks like a cow's spleen, with thin scales and purple-black. The two pieces can be combined at a glance, so they are called flounder. " As I said before, flounder is really a strange fish with eyes on one side and no eyes on the other, but it doesn't have only one eye, but its eyes are close to one side. It is a big mistake to say that it is "two pieces in one". How can two fish be kept together? Different kinds of flounder have different eye positions. The eyes of the halibut family are on the left, while those of the sole family and sole family are on the right.

In ancient China, flounder was a strange fish symbolizing faithful love. The ancients left many beautiful sentences praising flounder, such as "Phoenix is an amphibious fish" and "Why didn't you quit your job when you had a better job? I would rather be a mandarin duck than a fairy. Li Yu, a famous dramatist in the Qing Dynasty, once wrote a play about the love story of a talented person and a beautiful woman. The play was called Flounder.