Are there sharks in the Yangtze River?

Question 1: How many kinds of sharks are there in the Yangtze River? -Different kinds of sharks have different foods, some are meat, which can devour seals, turtles and even people, and some only eat plankton; The big one is 20 meters long and the small one is only a dozen centimeters. There are about 5 orders and 20 families (because taxonomists have different opinions), which are distributed in temperate and tropical waters all over the world. Except for a few sharks, such as Greenland sharks, few sharks live in the cold zone, because sharks are generally not active in water temperatures below 20℃. Sharks are fertilized, viviparous, ovoviviparous or ovoviviparous in vivo. Some female species have had rare asexual reproduction without males. Sharks' sensory organs are quite sensitive. They have organs that sense electric waves, so they can find prey hidden under the sand and even smell the smell of blood several kilometers away. In ancient China, sharks were called "sharks" and were considered as large aquatic creatures second only to dragons. Say, "The name of the fish. Out of Pan Guo in Le Lang. From fish, sand preserves sound. " .

Question 2: Does the Yangtze River have the option of decisively excluding sharks? Only sharks such as bull sharks and Borneo river sharks can enter fresh water, but they have not been found in China. Goldfish don't like the swift current of the Yangtze River, and some of them have been washed away ... Chinese alligators are distributed in the middle and lower reaches of the Yangtze River.

Question 3: Are there any sharks in the Yangtze River? No, shark (shā) fish, which lives in the ocean, is one of the fiercest fish in the ocean.

Question 4: Are there any sharks-like fish in the Yangtze River now? You mean the Chinese sturgeon? Yes Most of them are farmed.

Hey, hey, I have a fish tank at home. I bought it in a pet store the day before yesterday. Then there are fake sharks. Fresh water. There are many artificial socks.

After all, social life is rich now. Many people pay attention to ecology, stock more, and will come back slowly.

Well, there is another exception, that is, the messy things that are stocked may lead to further deterioration of the ecology. . . For example, Brazilian tortoise! ~~~~

Question 5: Will there be bull sharks in the Yangtze River? Bull sharks can move in fresh water. They are common in coastal areas, coral reefs, sand and mud bottoms, estuaries and lakes, and fresh or salt water in warm oceans. The water depth of the bull shark can reach150m, but generally it does not exceed 300m. Yangtze River? Go in and die.

Question 6: What kinds of fish are there in the Changjiang Estuary? Are there any sharks? There are no sharks, because the water is too weak, just go out a little more. The most famous and expensive is swordfish. Before Tomb-Sweeping Day, there were many common fish with 500 grams and 3000 yuan this year, such as perch, barracuda, puffer fish and so on.

Question 7: How many kinds of sharks are there? Classification of sharks: Chordata, Vertebrate Subdivision, Chondrichthyes are divided into 6 orders, 6 gill sharks, mouse sharks, tiger sharks, real sharks, horned sharks, saw sharks, flat sharks and wrinkled gill sharks, and about 27 species are divided into 8 orders and 30 families. 65,438+02 species may attack humans, and 65,438+02 species may be dangerous because of their size and habits. About 90 species are found in waters near Taiwan Province Province. Not every kind of shark is streamlined, the body of Pipa snapper is flat, the head of tiger shark is blunt, and the body of bamboo shark is long. The eight orders of sharks include six branchias, rat sharks, real sharks, tiger sharks, flat sharks, bearded sharks, horned sharks and sawed sharks. Among them, real sharks and horned sharks account for 77% of all species, and real sharks account for 56%. There are many kinds of sharks, including at least 350 species in the world's oceans and more than 70 species in the Sea of China. Most sharks are good for human beings. Sharks do have a reputation for eating people, but not all sharks eat people. Only more than 30 kinds of sharks attack humans and ships for no reason. Whale shark is the biggest shark and the biggest fish. Whale sharks survive by preying on small fish or plankton in tropical or subtropical oceans. When a whale shark preys, it will stand motionless underwater with its mouth open, like a big filter. As the largest fish, whale sharks are usually 15 meters (50 feet) long and weigh 18 tons. Whale sharks usually do not pose a danger to humans, but if whale sharks think you are an enemy, they will also take the initiative to smash ships and attack humans. The great white shark is the largest carnivorous shark, which is found in tropical oceans and all warm provinces in the world. Its hearing, vision, taste, touch and even electronic induction are excellent. So the hunting ability is very strong. The hammerhead shark, named after its long hammer head, is the most recognized of the 368 shark species in existence. Its distinctive head makes it rotate freely in the water, and its eyes and nostrils are located in the most favorable parts on both sides of the head, which is convenient for chasing prey. Saddle sharks live in temperate seas and prey on various marine invertebrates. Saddle shark is an aggressive shark, which will attack humans for no reason. Dog shark is a very small shark, which is divided into spiny shark; Black pike, green pike.

Question 8: Are there any sharks in the Sea of China? Oh, there are sharks in the Yellow Sea, the East China Sea and the South China Sea.

Question 9: Are there any sharks in the Yellow River? The Yellow River is fresh water. There will be no sharks, only in the sea. Don't worry.

Question 10: Are there any sharks in the Sea of China? Foraminifera of cartilaginous fishes. There are more than 350 species of sharks in the world, and there are about 70 species in China. Man-eating sharks only account for 1/5 of shark species.

Among them, there are 6 species of hexagonal sharks belonging to 4 genera and 2 families in China, among which Hana and N.platycephalus H.perls are more common; In China, there are tiger sharks 1 family 1 genus, which belong to Heteroodontidae and Heteroodontidae, and they are divided into Japanese tiger sharks and zebra tiger sharks. In China, there are 5 families, 6 genera 1 1 species of sauridae, which belong to odontidae, Sarcophagidae, and ceratosaurus. Frees of Orectolob buckle on shark day are divided into shark family and whale family; Carcharhiniformes is divided into cat sharks, wrinkled-lipped sharks, real sharks and lipped sharks; There are 36 species belonging to 4 families 13 genera in China, including 7 species belonging to 5 genera. There are two common genera: sharks and sharks.

25 Species of Dangerous Sharks in Taiwan Province Province.

Notorynchus cepedianus has a record of attacking people in the aquarium.

Spotted-tailed catfish is small and lives on the bottom of the sea, which may be aggressive.

Sandflies are potentially dangerous.

mackerel

Rhincodon typus is potentially dangerous because of its large size.

A shark with teeth

Taurus is potentially dangerous for divers.

Tail attack of short-tailed bat

Elephant shark

Because of its huge size, whale sharks are potentially dangerous.

Man-eating shark (great white shark)

Carcharodon carcharias is one of the most dangerous species.

Shark mackerel is very dangerous.

Long-arm mackerel

Isurus paucus is potentially dangerous.

White-edged finned white-eyed shark

White-edged storks are potentially dangerous.

Short-tailed snakehead is potentially dangerous.

* Smooth white-eyed sharks

Sickle shad are potentially dangerous.

Bull-eyed shark

White shark is one of the most dangerous species.

Grouper is potentially dangerous.

* Spotted white-eyed shark

Long-billed dragons are dangerous.

Blackfin sharks are potentially dangerous.

* Grey-eyed sharks

The snakehead is huge and very dangerous.

* Carcharhinus plumbeus is potentially dangerous.

Salad white-eyed shark

Carcharhinus sorrah can be dangerous.

Skunk mackerel

Galeocerdo cuvier is one of the most dangerous species.

* Shark tooth mackerel

Prions are dangerous.

* Red meat pheasant

Sphyrna lewini is potentially dangerous.

Sphyrna mokarran is a shark with eight fins and is potentially dangerous.

* Ji Ya thrush

Sphyrna zygaena is potentially dangerous.

Other species and distribution:

Hana flat-headed shark (inshore benthic fish, oviparous, about 3 meters long, weighing 200-300 kg. It is a large edible fish, distributed in the Yellow Sea, East China Sea, South China Sea and Taiwan Province Province. )

Tiger shark (1 m long, warm-bottom fish, distributed in Yellow Sea, Bohai Sea, East China Sea and Taiwan Province Province. )

Man-eating shark (Carnivora, man-eating shark, body length12m, weight18000kg, viviparous, distributed in Yellow Sea, Bohai Sea, East China Sea, South China Sea and Taiwan Province Province. )

Fox-shaped long-tailed shark (long-tailed shark family, 6 meters long, oviparous, distributed in the Pacific Ocean, Atlantic Ocean, Indian Ocean and coastal areas of China ... >; & gt