The largest freshwater fish in the world is the region in which it lives

The walrus fish, also known as the "arapaima", has a history of 100 million years, originated in the Amazon River basin, and can reach 5 meters long and weigh 200 kilograms.

Walrus fish is said to be the largest freshwater fish, up to about 5 meters, and up to 200 kilograms, but according to a statement issued by the World Wildlife Society, Thai fishermen caught a catfish weighing 293 kilograms in northern Thailand, and this Mekong giant catfish may be the world's largest freshwater fish, far exceeding the legendary largest 200 kilograms of walrus fish, but this catfish died soon after the harvest. In addition, the giant salmon in Xinjiang is nearly 5 meters in size, and its weight is unknown.

Walrus fish is one of the remaining ancient freshwater fishes, which are thought to have first appeared 100 million years ago, and are known as arapaima because of the teeth that grow from the hard bones of the tongue. It mainly catches prey with the opening and closing of the upper part of its mouth and its tongue, feeds on fish and insects, and is good at jumping.

1. Salmon.

Maximum size: The maximum weight of the adult body is about 50 kg, and the length is about 2 metersHabitat area: There are five species in the world, distributed in the Danube River basin in northern Asia and Europe2, and the giant catfish in the Mekong River.

Maximum size: 118 inches (300 cm), pounds (about 300 kg) Habitat area: along the Mekong River, muffled Southeast Asia, do cover well 3, Mississippi spoon sturgeon.

Maximum size: 87 inches (221 cm) with head plates Habitat area: Mississippi River coast, North America.

4. European giant catfish.

Maximum size: 197 inches (about 500 cm), 675 lbs (about 306 kg) Habitat area: Widely distributed in Europe and Asia.

5. Alligator gar.

Maximum size: 120 inches (about 305 cm), 300 lbs (about 136 kg) Habitat area pure lead: along the Mississippi River, North America.

6. Nile perch.

Maximum size: 79 inches (about 200 cm), 441 lbs (about 200 kg) Habitat area: Nile River basin, Africa.

7. Giant freshwater stingrays.

Maximum size: 197 inches (about 500 cm), 1323 pounds (about 600 kg), and the body length reaches 95 inches (about 240 cm) without tail

Habitat area: along the Mekong River, Southeast Asia.

8. Arapaima.

Maximum size: 177 inches (about 450 cm), 441 lbs (about 200 kg) Habitat area: Amazon River basin, South America.

9. Australian freshwater cod.

Maximum size: 79 inches (200 centimeters), 250 pounds (kilograms) Habitat area: along the Murray River, Australia.

10. Siamese giant carp.

Maximum size: 118 inches (about 300 cm), pounds (about 300 kg) Habitat area: Mekong Basin, Southeast Asia, 3,

Let's see how big the world's largest freshwater fish is, as I follow in.

The largest freshwater fish, the sturgeon

The largest freshwater fish in the world is the sturgeon, a large species that looks very much like a marine fish, and its size is so large that it is considered the largest freshwater fish in the world.

Sturgeon, known as sturgeon in ancient times, belongs to the phylum Chordates. The body length is meters, it is the world's existing fish in the body size, long life, the oldest fish, has a history of more than 200 million years, originated in the Cretaceous period hundreds of millions of years ago, known as the "water panda" and "water living fossils" said, the existing ancient biological population.

There are two main areas where sturgeon are concentrated: the Caspian Sea and the Black Sea in Eastern Europe, and the eastern part of Asia and the western part of North America. It is one of the oldest fish species in the world, the body size is particularly large, generally speaking, there are 2 3 meters long, the longest is 7 8 meters, the average weight is 200 400 kilograms, of course, the sturgeon weighing more than 1000 kilograms is not a few, such a large marine fish is very common, but freshwater fish are rare.

The largest freshwater fish, the sturgeon

Sturgeon are bred as ornamental fish for their peculiar body shape. The head of the sturgeon is plough-shaped, the mouth is lower, the tail is crooked, and the body has 5 rows of bony plates. Both juveniles and adults have ornamental value, and the juveniles of the sturgeon (distributed in Heilongjiang) have been officially reared as ornamental fish since the successful artificial breeding.

The common individuals of most species are tens to hundreds of kilograms, the largest individual of the European sturgeon is 1600 kilograms, and the largest individual of the Chinese sturgeon in China is 600 kilograms.

Sturgeon are animal-eating fish that feed on zooplankton during the feeding phase of the juveniles, but soon the fry develop into a benthic life. Adapting to this lifestyle, the sturgeon has a protruding and lower mouth. The preferred food of sturgeon varies from species to species, but the main foods are earthworms, crustaceans, molluscs and small fish.

Sturgeon fry can be fed directly with artificial compound feed after feeding, and in actual production, live bait (zooplankton or chopped earthworms) is used for sturgeon fry that have just opened to feed. After about 30 days of feeding, the sturgeon fry can grow to the size of body length and weight, and the survival rate can reach more than 60%. However, due to the difficulty of live bait and the high level, sturgeon fry can be domesticated as artificial compound feed after about 30 days of cultivation with live bait.

Sturgeon has been successfully raised for commercial use of compound feed.

Fish is a creature that no one will feel strange, it is a creature that lives in the water and can swim, freshwater fish is living in freshwater, saltwater fish is living in seawater, so what is the largest freshwater fish in the world? The world's largest fish lives in Heilongjiang Province, China. It's called a rayfish.

Here's an introduction to the world's largest freshwater fish.

01 Fish is a large carnivorous fish, an adult fish can weigh about 2,000 catties, the fish has a strong reproductive ability, it is said that it can lay 60 to 4 million fish eggs at a time.

02 The fish is a creature left over from ancient times, and it is very likely to be the same era as the dinosaurs, so it is very rare, and it can be said to be a water panda in China. The fish has been identified as an endangered species.

03 Juvenile rays have a very low survival rate and mature very late, with males not reaching maturity until they are 12 years old, and females reaching maturity four years later.

04 Heilongjiang has mature breeding technology for artificial breeding of rayfish, and has built many release stations. In 2003, a local caught a wild fish that was 830 pounds long.

05 Although it only takes six years for captive-bred rays to grow to hundreds of catties, it is difficult to find wild rays of such a large size now.

The natural environment is extremely important to human beings and other creatures on the earth, so it is everyone's responsibility to protect the natural environment.

The world's largest freshwater fish are: giant stingray, Chinese sturgeon, Dab's sturgeon, tall sturgeon, and European sturgeon.

1. Giant stingray

The giant stingray is a large freshwater stingray that lives in the Mekong River in Thailand and is the largest known stingray and the largest venomous fish, as well as the world's largest freshwater cartilaginous fish and one of the world's largest freshwater fish.

2. Chinese sturgeon

Chinese sturgeon, also known as Chinese sturgeon, eel, bitter wax, etc., is an ancient and rare fish native to China, and they have important academic research value like the giant panda. Although it can live in freshwater, its traces can also be found in the ocean. Their common individuals are around 50-300 kilograms, and larger individuals can reach up to 5 meters in length and weigh up to 600 kilograms.

Because it is the largest fish in the Yangtze River, it is known as the "King of Fish of the Yangtze River".

3. Dalde's fish

Dab's fish is a cartilaginous fish of the family Sturgeonidae. The head is pointed, the tail is crooked, and the body has no scales, while there are 5 rows of diamond-shaped bony plates (hard scales) on the dorsal spine and sides. Adult individuals of this fish can reach up to meters in length and weigh up to 1 ton.

It is distributed in the Heilongjiang River, the boundary river between China and Russia, and never migrates into the sea, but only swims far or near the Heilongjiang River and its tributaries, and stays in the deep water of the river in winter.

They are ferocious, voracious, and will bite their own kind when they are hungry, and can swallow fish weighing several thousand grams by swinging their tail fins and opening their mouths wide in the water.

4. Tall-headed sturgeon

The sturgeon, also known as the American white sturgeon, is a large sturgeon found in the United States and the largest sturgeon in North America. Adults can reach up to 6 meters in length and weigh up to 700,850 kilograms.

Large fish can live in both freshwater and seawater, and although they have lived on Earth since prehistoric times, the construction of river dams has caused the loss of habitat and the degradation of spawning grounds, and they were once in danger of extinction.

5. European eel

Undoubtedly, the European ray is the world's largest freshwater fish. They can be up to a metre long and weigh anywhere from 1,600 to 3,200 kilograms, making them the largest and most prized species of sturgeon. They are found in the Caspian Sea and the basins of the Sea of Azov and the Black Sea, and in marine waters, they mainly inhabit the pelagic zone of the waters.

In the Black Sea, European rays can dive to depths of 160 or even 180 meters. In anadromous or descending migrations, European rays generally migrate in the deepest part of the riverbed, where they are thought to often swim into the upper waters.