The largest fish in the world: whale shark
Whale shark is the largest shark and the largest fish, usually 9- 12 meters long. The largest individual is 20 meters long and weighs as high as 12500 kg, making it the tallest fish. It belongs to marine fish. Eat a lot of plankton and small fish. Migrate to China Beibu Gulf in May and June every year. Widely distributed in tropical and temperate seas, and distributed in all seas of China in summer and autumn. Mild temperament. Due to a large number of killings, the number has dropped sharply.
Up to now, the largest body types actually recorded by biologists are 12.65 meters long and 2 1.50 tons, but other larger individuals have not been confirmed. Whale sharks are the only members of Rhincodontidae (formerly known as rhinodontidae1984) and Whale sharks. Biologists believe that this shark appeared about 60 million years ago.
Whale sharks live in tropical and temperate waters, and their life span can reach 70 to 100 years. Whale sharks are filter feeders, feeding on plankton, macroalgae, krill and small self-swimming animals (such as small squid and vertebrates). Their teeth don't function as foragers. In fact, they are not big. Whale sharks are common in South China Sea of China, Taiwan Province Province of China, China Strait, East China Sea of China and South Yellow Sea. Although whale sharks usually appear in offshore areas, their seasonal foraging activities occasionally occur in several coastal areas.
Whale sharks usually act alone, and they rarely get together unless they are foraging in food-rich areas. Male whale sharks have a larger range of activities than females, because females prefer to appear in certain places. Whale sharks swim slowly and often float on the water to bask in the sun. Although whale sharks are huge, they will not do great harm to human beings. They are often used by scientists to educate the public, not all sharks will? Eating people? . In fact, whale sharks are very gentle and play with divers.
Due to its scarcity, whale sharks are listed in the second-class protection list of international endangered wild animals.
The largest freshwater fish in the world
1, Mekong giant catfish
Nickname: giant toothless fish 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.
Red List of World Nature Conservation Endangered Level: 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. Adult males have an average body length of 2.43 meters and a weight of 163.44 kg. The largest Mekong giant catfish on record was caught in northern Thailand in 2005. It weighs 293 kilograms and is 2.7 meters long.
Giant catfish in Mekong River is a large migratory fish, which usually lays eggs in the waters of northern Thailand and grows in the waters of Tonle Sap in Cambodia. The number of giant catfish has decreased by 95-99% since the last century. At present, about hundreds of adult giant catfish survive and are listed as highly endangered in the red list of world nature protection.
2. Hucho taimen
Nicknames: Tiger Minister, Hucho, Hucho, Hucho.
Maximum size: the maximum weight of an adult is about 50 kg and the body length is about 2 meters.
Habitat: There are five species in the world, distributed in the Danube River basin in northern Asia and Europe.
Red List of World Nature Conservation Endangered Level: Vulnerable
Main natural enemies: overfishing and environmental pollution.
Hucho taimen is a cold-water and fresh-water carnivorous fish, mainly distributed in northern Asia, and found in the Volga River basin in the west, the Bojola River basin in the east, the Heilongjiang River basin in the south and the Lena River basin in the north. Hucho taimen 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 body length of 4 meters and a weight of 90 kg have been found, preying on fish and frogs, snakes, rats and birds that live on water. Hucho is a precious fish because its meat is delicious.
Long, slightly flat, cylindrical. The head is flat, the tip of the nose is cracked, and it is in the terminal position. The maxilla is obvious and free, extending backward to the posterior edge of the eye. There are inwardly inclined sharp teeth on the upper and lower jaws, vomeroids and tongue. The scales are extremely small and oval, and the ring plates on the scales are clearly arranged without radiation slots. Lateral line scale 193-242 pieces of lateral line are complete. Lipid fins are well developed. The back is blue-brown and the abdomen is silvery white. There are many small dark black cross-shaped spots on the head and side of the body, as dense as millet. During spawning, both sexes are bronzed, and the lower leaves of ventral fin and caudal fin are orange-red, especially for male fish.
3. European giant catfish
Nickname: the giant salamander.
Maximum size: 197 inch (about 500 cm), 675 pounds (about 306 kg)
Habitat: Widely distributed in Europe and Asia.
Red List of World Nature Conservation Endangered Level: Not Endangered
Catfish (also known as giant catfish in Europe) is one of the largest fish in the world. It is long and scaleless, covered with patterns like tinfoil, and its personality is very rough. Eating people? Rumors. Maximum size: 197 inch (about 500 cm), 675 pounds (about 306 kg).
4. Mississippi paddlefish
Maximum size: 87 inches (about 22 1 cm) with head bone plate.
Habitat: Mississippi River in North America.
Red List of World Nature Conservation Endangered Level: Vulnerable
Main natural enemies: overfishing, shrinking wild habitat and environmental pollution.
Paddlefish is one of the only two kinds of fish in the world, and it is a large freshwater economic fish. The sturgeon is relatively large, with a body length of 220 cm and a weight of 100 kg. The name of the sturgeon comes from its strange kiss. It is very long and flat as an oar. The sturgeon detects its surroundings and prey through sensors on its nose.
5. Nile perch
Maximum size: 79 inches (about 200 cm), 44 1 lb (about 200 kg)
Habitat: Nile Valley, Africa
Endangered level of the Red List of World Nature Conservation: not included.
Main natural enemies: environmental pollution
Nile tilapia is a freshwater fish of Perciformes. They are widely distributed in Ethiopian biogeographic regions, and will appear in the basins such as Lake Chad, Congo River, Nile River, senegal river Lake and Turkana Lake, and are also found in the brackish water of Lake Mareotis. Its common names include African snook and the names of a large number of 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, nearly 2 meters long and weighing 200 kilograms.
Adult fish can live in an oxygen-rich environment in the lake, while young fish are confined to the coast or sheltered places. Nile perch is a fierce carnivore, which feeds on fish (including the same kind), crustaceans and insects. Young fish feed on zooplankton.
Nile perch has been introduced into many African lakes, including Lake Victoria. The introduction of this species is often regarded as a negative textbook of the impact of alien invasive species on local ecology. The World Conservation Organization (IUCN) lists 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 for aquaculture.
Nile perch is the largest member of Cetaceae. 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 captured by Will Liam Toth in Lake Nasser, Egypt in 2009.
6.crocodile eel
Nickname: Crocodile Monopterus albus or Monopterus albus
Maximum size: 120 inch (about 305 cm), 300 pounds (about 136 kg).
Habitat: Mississippi River in North America.
Endangered level of 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 a dagger. The fish is cylindrical in length, densely covered with blue-gray rhombic scales, with dark black stripes, protruding snout, teeth on the upper and lower jaws, and looks like a crocodile mouth, hence the name. Brown or olive back, shallow abdomen. Scales are diamond-shaped hard scales, which American Indians sometimes regard as gems. Alligator is the largest one-legged crocodile, with a body length of 8 to 10 feet and a minimum weight of 200 pounds.
Crocodile eel, scientific name Dafinch eel, the average body length is 2 meters, and the highest record is 8.57 feet! Converted to international unit = 2.64m! The average mature weight is 80 ~ 137 kg, (185? The female is slightly larger than the male, which is the largest of the seven existing species of finches. The fish is cylindrical in length, densely covered with blue-gray rhombic scales, with dark black stripes, protruding snout, teeth on the upper and lower jaws, and looks like a crocodile mouth, hence the name. Crocodile eel is a kind of fish that appeared on the earth earlier than dinosaurs, and its survival time is much longer than dinosaurs.
7, 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 in the Red List of World Nature Conservation: the data is unknown.
Main natural enemy: overfishing
The giant bone tongue fish is huge, the adult body length can exceed 2.5 meters, the longest can reach 3 meters, and the weight is as high as 200 kilograms. Long and slightly flat. The bones of the head are composed of free plate bones. Mouth, don't need it. Without the mandible, the teeth on the tongue are strong and developed. The swim bladder is surrounded by blood vessels, its inner surface is honeycomb, and there are often special suprabranchial organs. Scales are big and hard, and they are inlaid. The dorsal fin and the anal fin are located at the back of the body, facing each other. The pectoral fin is very low. The ventral fin is located behind the abdomen. The caudal fin is round. The body is grayish green, the back is dark, the abdomen is light, and the tail fin and back are red.
8. Freshwater stingrays
Maximum size: 197 inches (about 500 cm), 1323 pounds (about 600 kg), 95 inches (about 240 cm) without tail.
Habitat: Mekong River and Southeast Asia.
Red List of World Nature Conservation Endangered Level: Vulnerable
Main natural enemies: overfishing and environmental pollution.
The giant freshwater stingray is one of the largest freshwater fishes in the world. No one knows how the fish survive, their suitable habitat, or 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 the evolution of millions of years, the giant stingray.
Giant stingray
It is 5 meters long and weighs 600 kilograms. They are brown to gray in color, wide and flat, and have a long whiplike tail. Giant stingrays often appear in river systems in Thailand, Borneo, New Guinea and northern Australia. They often bury themselves in the sand or muddy river bottom and breathe through holes or spouts at the top of their bodies.
9. 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.
Endangered level of the Red List of World Nature Conservation: not included.
Main natural enemies: overfishing and shrinking of wild habitats.
The fish head looks big and has no beard. The giant Siamese fish is the largest freshwater fish, and may also be the largest CYPRINIDAE fish. A few individuals are below 1.5 meters, weighing 45 kilograms. The big one can be as long as 3 meters and weigh 300 kilograms. [1] Only one kind of fish named Mahsur can compare with it, but the large Mahsur is only recorded one hundred years ago.
10, freshwater cod
Maximum size: 79 inches (about 200 cm), 250 pounds (about 1 13.5 kg).
Habitat: murray river coast.
The ranking of endangered degree in the Red List of World Nature Conservation: Endangered
Main natural enemies: overfishing and shrinking of wild habitats.
Most cod live in the cold seas of Pacific Ocean and North Atlantic Ocean, where the water temperature is 0℃ ~ 16℃. As long as you eat something moving, it will grow fast, and it will grow to 1 m in about 10 years. A female fish with a body length of about 1 m can lay as many as 3 to 4 million eggs at a time. Because of social life, it is easy to catch, and it has been a famous edible fish since ancient times.