There are 2 distinct skin ridges on each side, with huge mouth, anterior position and labial folds on the upper and lower jaws. The nostrils are located at both sides of the snout, and the water outlet hole is opened in the mouth. Small eyes, small spray holes, located behind the eyes. Teeth are small and numerous, conical, and their heads are tilted backward, so they are used in many rows. The gill holes are very wide. 2 dorsal fins, no hard spines. The caudal fin is short and fork-shaped, with one fold on each side of the caudal stalk, the axis of the caudal vertebra is upturned, and there is a depression above the caudal base. The pectoral fin is wide, gray-brown, reddish-brown or bluish-brown, with many yellow spots and stripes. Let's talk about some other species of the largest fish in the world.
1, the largest fish in the world? Giant catfish of Mekong River
Nicknames: giant toothless, fishy awn
Maximum size: 1 18 inch (300 cm), 66 1.4 lb (about 300 kg).
Habitat: Mekong River and Southeast Asia.
Life expectancy: 60 years.
Rank of Endangered Degree on the Red List of World Nature Conservation: Highly Endangered
Main natural enemies: overfishing and shrinking of wild habitats.
The Mekong giant catfish is the largest freshwater fish in the world and the holder of the Guinness World Record. The average length of adult male fish is 2.43 meters and the weight is 163.44 kg. The largest Mekong giant catfish recorded was caught in northern Thailand in 2005. It weighs 293 kilograms and is 2.7 meters long.
Mekong giant catfish is a large fish with migratory behavior, which usually lays eggs in the northern waters of Thailand and grows in the waters of Tonle Sap in Cambodia. Since the last century, the population of the giant catfish has decreased by 95-99%. At present, there are about hundreds of adult giant catfish surviving, and it ranks as highly endangered in the red list of nature protection in the world.
2. The largest fish in the world? Hucho
Nicknames: Huchen, Zheluo Fish, Zheluo Fish, Zhelu Fish.
Maximum size: the maximum weight of an adult is about 50 kg, and it is about 2 meters long.
Habitat: There are five species in the world, distributed in the Danube River basin in northern Asia and Europe.
Rank of Endangered Degree on the Red List of World Nature Conservation: Vulnerable
Main natural enemies: overfishing and environmental pollution.
Hucho taimen (scientific name: Hucho taimen) is a kind of cold-water freshwater carnivorous fish, mainly distributed in northern Asia, found in the Volga River basin in the west, Bochaola River basin in the east, Heilongjiang River basin in the south and Lena River basin in the north. Hucho lives in fast-flowing streams most of the time, overwinters in deep water bodies such as rivers and lakes in winter, and migrates to streams to lay eggs in spring. Fierce, large in size, with a body length of more than 1 m, but individuals with a length of 4 meters and a weight of 90 kg have been found, preying on fish and frogs, snakes, rats and birds living by water. Hucho is a valuable fish because of its delicious meat.
Body length, slightly flat, cylindrical. The head is flat, the nose is pointed, the mouth is cracked, and it is in the end position. The maxilla is obvious and free, and extends backward to the posterior edge of the eye. There are sharp teeth inclined inward on the upper and lower jaw, vomer and tongue. The scales are extremely small and oval, and the rings on the scales are arranged clearly, without radiation grooves, with lateral line scales 193-242 pieces and complete lateral lines. Lipid fins are well developed. The back is bluish brown and the abdomen is silvery white. There are many small dark black cross-shaped spots on the head and side of the body, which are as dense as millet. During the spawning period, both sexes show bronze color, and the lower leaves of ventral fin and caudal fin are orange-red, especially for male fish.
3. The biggest fish in the world? European giant catfish
Nickname: silurus glanis.
Maximum size: 197 inch (about 500 cm), 675 pounds (about 306 kg)
Habitat: Widely distributed in Europe and Asia.
Rank of Endangered Degree on the Red List of World Nature Conservation: Not Endangered
? Silurusglanis (Silurus glanis, also known as the giant catfish in Europe) is one of the largest fish in the world. It is long and scaleless, covered with patterns like tin foil, and its personality is very rough. Eating people? Rumors. Maximum size: 197 inch (about 500 cm), 675 pounds (about 306 kg).
4. The biggest fish in the world? Mississippi paddlefish
Maximum size: 87 inches (about 22 1 cm) with the head bone plate.
Habitat: Mississippi River, North America.
Rank of Endangered Degree on the Red List of World Nature Conservation: Vulnerable
Main natural enemies: overfishing, shrinking wild habitat and environmental pollution.
? The paddlefish is one of only two species in the world, and it is a large freshwater economic fish. The individual of the paddlefish is large, with a body length of 220 cm and a weight of 100 kg. The name of the paddlefish comes from its strange-looking kiss, which is extremely long and flat like a paddle. The paddlefish detects its surroundings and prey through sensors on its nose.
5. The biggest fish in the world? Nile perch
Maximum size: 79 inches (about 200 cm), 44 1 lb (about 200 kg)
Habitat: Nile Valley, Africa
Rank of Endangered Degree on the Red List of World Nature Conservation: Not included.
Main natural enemies: environmental pollution
Lates niloticus is a freshwater species in the family Percidae of Perciformes. They are widely distributed in Ethiopian biogeographic region, and will appear in Chad Lake, Congo River, Nile River, senegal river Lake, Turkana Lake and other river basins, and have also been found in the brackish water of Mareotis Lake. Its common names include African snook and a large number of names in different African languages.
Nile perch is silver with light blue. They have particularly dark eyes and bright yellow outer rings. They are one of the largest freshwater fish, with a length of nearly 2 meters and a weight of 200 kilograms.
Adult fish can live in an environment with sufficient oxygen content in the lake, while young fish are confined to the coast or with barriers. Nile perch is a fierce predator, feeding on fish (including its own kind), crustaceans and insects; Young fish feed on zooplankton.
Nile perch was introduced into many African lakes, including Lake Victoria. The introduction of this species is often regarded as a negative teaching material for the impact of invasive species on local ecology. The World Conservation Organization (IUCN) listed Nile perch as one of the most harmful invasive species in the world 100. Although it is an invasive species, Nile perch is still an important food fish, which is extremely important to aquaculture.
? Nile perch is the largest member of the family Cetacidae. It is said that it once had a big fish weighing more than 400 pounds, but the world record of the International Fishing Federation is 230 pounds, which was caught by Will Liam Toth in Lake Nasser, Egypt in 2009.
6. The biggest fish in the world? Crocodile eel
Nickname: Crocodile Monopterus albus or Big Monopterus albus
Maximum size: 120 inch (about 305 cm), 300 pounds (about 136 kg)
Habitat: Mississippi River, North America.
Rank of Endangered Degree on the Red List of World Nature Conservation: Not included.
Main natural enemies: none
? Crocodile eel or giant eel is a very primitive radial fin fish, which has existed on the earth for 100 million years. Its name comes from its short kiss like a crocodile and two rows of teeth as sharp as daggers. The fish body is long and cylindrical, densely covered with blue-gray diamond scales, with dark black stripes, a protruding snout, and teeth on the upper and lower jaws, which are shaped like crocodile mouths, hence the name. The back is brown or olive, and the abdomen is lighter. Scales are diamond-shaped hard scales, which American Indians sometimes use as gems. The alligator is the largest in the order Monopterus, with a length of 8 to 10 feet and a minimum weight of 200 pounds.
Crocodile finch eel, the scientific name of which is Dafinch eel, has an average body length of 2 meters, with a record of 8.57 feet! Converted to international units = 2.64m! The average mature weight is 80 ~137 kg, (185? 300 pounds) The female is slightly larger than the male, which is the largest of the seven existing species of finches. The fish body is long and cylindrical, densely covered with blue-gray diamond scales, with dark black stripes, a protruding snout, and teeth on the upper and lower jaws, which are shaped like crocodile mouths, hence the name. Crocodile eel is a fish that appeared on the earth earlier than dinosaurs and survived much longer than dinosaurs.
7. The biggest fish in the world? Giant bone tongue fish
Nicknames: walrus fish, elephant fish, big-headed giant bone tongue fish, warship dragon, dragon.
Maximum size: 177 inch (about 450 cm), 44 1 pound (about 200 kg)
Habitat: Amazon basin in South America.
The ranking of the degree of endangerment on the Red List of World Nature Conservation: the data is unknown.
Main natural enemy: overfishing
Giant bone tongue fish is huge, the adult length can exceed 2.5 meters, the longest is 3 meters, and the weight is as high as 200 kilograms. Long, slightly flattened. The bones of the head are composed of free plate bones. Big mouth, no need. No mandible, strong and developed teeth on the tongue. The swim bladder is surrounded by blood vessels, and the inner surface is honeycomb-shaped, and there are often special suprabranchial organs. The scales are large and hard, and they are inlaid. The dorsal fin and the gluteal fin are located at the back of the body and are opposite to each other. The pectoral fin is low. The ventral fin is located behind the abdomen. The caudal fin is round. The body is gray-green, the back is dark, the abdomen is light, and the tail fin and the back of the body are red.
8. The biggest fish in the world? Freshwater stingray
Maximum size: 197 inches (about 500 centimeters), 1323 pounds (about 600 kilograms), and the body length reaches 95 inches (about 240 centimeters) without the tail.
Habitat: Mekong River and Southeast Asia.
Rank of Endangered Degree on the Red List of World Nature Conservation: Vulnerable
Main natural enemies: overfishing and environmental pollution.
Giant freshwater stingray (Himantura polylepis) is one of the largest freshwater fishes in the world. No one knows how this kind of fish survive, their suitable habitat, even whether they venture into the ocean, their common close relatives and so on. We have no way of knowing. This ancient fish has undergone great changes in millions of years of evolution, giant stingrays.
Giant stingray
It is 5 meters long and weighs 600 kilograms. They are brown to gray in color, wide and flat in shape and have a long whip-like tail. Giant stingrays often appear in river systems in Thailand, Borneo, New Guinea and northern Australia. They often bury themselves in sand or at the bottom of muddy rivers and breathe through holes in the top of their bodies or water jets.
9. The largest fish in the world? Siamese giant carp
Maximum size: 1 18 inch (about 300 cm), 66 1.5 lb (about 300 kg).
Habitat: Mekong River Basin in Southeast Asia.
Rank of Endangered Degree on the Red List of World Nature Conservation: Not included.
Main natural enemies: overfishing and shrinking of wild habitats.
The fish head looks huge and has no whiskers. The giant Siamese carp is the largest among freshwater fish, and may also be the largest CYPRINIDAE fish. A few individuals are below 1.5 meters, weighing 45 kilograms. Large ones can be up to 3 meters long and weigh 300 kilograms. [1] Only one fish named Mahseer can compare with it, but the large Mahseer was recorded only a hundred years ago.
10, the largest fish in the world? Freshwater cod
Maximum size: 79 inches (about 200 cm), 250 pounds (about 1 13.5 kg).
Habitat: along the Murray River in Australia.
The ranking of the degree of endangerment in the Red List of World Nature Conservation: Endangered
Main natural enemies: overfishing and shrinking of wild habitats.
Most cod live in the cold sea of the Pacific Ocean and the northern Atlantic Ocean where the water temperature is 0℃ ~ 1 6℃. As long as they eat everything that moves, they grow fast, and they can grow to1meter in about 10 years. The female fish with a body length of 1 m can produce as many as 3 to 4 million eggs at a time. Because of the group sex life, it is easy to catch, and it has been a famous edible fish since ancient times.