On the Earth, there are many species of fish with amazing size and weight. Here are top 10 species of huge freshwater fish in the world.
Beluga sturgeon, Beluga (sturgeon), Giant freshwater stingray, Mekong giant catfish, Spotted gar, Arapaima gigas and Paddlefish are considered to be species of fish owning the biggest size in the world.
The Beluga (sturgeon), which takes residence in Russia, is the largest freshwater fish in the world. It is known that this giant fish can reach a length of over 4.5 meters and a weight of nearly one ton. Beluga (sturgeon) kept a record of the length of 6.1 meters and the weight of 2,612 tons.
Nowadays, the hunting of Beluga in a large number and the emergence of a range of plant have considerable impacts on the habitat and reproduction of Beluga. For this reason, Beluga sturgeon are on the verge of extinction. Fortunately, this species has a lifespan of over 100 years. As a result, many scientists are making a great effort to protect Beluga. In addition, they are researching on artificial insemination to propagate this giant fish.
The White Sturgeon are the largest freshwater fish in North America and the second largest in the world. White Sturgeon can be found along the Western coast from the Aleutian Islands to Central California, USA. The length of this huge species can reach up to 6.1 meters and the weight is up to 560 kilograms. Despite having a long life expectancy, they is still at risk of extinction because their habitat is severely affected. Up to now, there are only about 500 individuals of this species existing in the world.
Giant freshwater stingray
The Giant Freshwater Stingray with extremely large size live in some rivers in Thailand, Malaysia and Borneo. When growing up, this species can be over 3 meters in length and nearly 500 kilograms in weight. At present, due to over hunting and threatened habitat, this giant fish is in danger of extinction.
Mekong giant catfish
Mekong giant catfish are the freshwater fish species living in the lower section of Mekong. With a length of over 3 meters and a weight of up 300 kilograms, the Mekong giant catfish is listed among 10 species of huge freshwater fish in the world. With the good taste of meat, they have been heavily hunted. Besides, their habitat is under negative impacts. All of these conditions drive this species to a high risk of extinction. This giant fish is also included in the Red Data Book of International Union for Conservation of Nature (IUCN).
Nevertheless, currently, numerous research projects on the preservation of Mekong Giant Catfish are being carried out. In addition, artificial propagation has gradually helped this species escape from the risk of being extinct.
The Spotted Gar are one of the most giant and terrifying fish species in the North America. Although spotted gar owns a large set of teeth that are quite similar to crocodiles together with fierce appearance, they are not dangerous to humans. In fact, there have not been any documents or researches of their attacks on humans.
When attaining adolescence, Spotted Gar can achieve up to a length of 1.8 meters long and a weight of more than 45 kilograms. However, some witnesses said that they saw several individuals of this species that are 3 meters in length and 159 kilograms in weight.
Arapaima gigas are gigantic freshwater fish in the Amazon basin of South America. If living in the wilderness, Arapaima Gigas can reach a length of 2.5 meters and a weight of more than 125 kilograms.
A special feature of this species is that they are able to breathe in the water containing very low oxygen level. The reason is that in addition to gill, the Arapaima gigas has a swim bladder including lung tissues, which allow them to take oxygen from the air to maintain the respiration.
Paddlefish family are the freshwater fish that appeared on Earth 70 to 75 million years ago. Currently, just two species of this family including American Paddlefish living in the Mississippi River Basin and Chinese Paddlefish in the Yangtze River Basin are still in existence.
In natural conditions, American Paddlefish can be longer than 1.5 meters and weighs nearly 30 kilograms while Chinese Paddlefish is 3 meters in length and 500 kilograms in weight. Additionally, it is recorded that some individuals of this species in the Yangtze River can reach a length of 7 meters and a weight of over one ton.