Freshwater fish are those spend some or all of their lives in fresh water like rivers and lakes, with a salinity less than 0.05%. The fish need a range of physiological adaptations to survive in fresh water. Around 41.24% of all known species of fish are found in fresh water. Fishes migrating between salt water and fresh waters they need adaptations for both environments, when in salt water they want to keep the bodily salt concentration on a level lower than the surroundings. Here we are listing top 10 largest fresh water fish in the world.
The beluga is a species of anadromous fish in the sturgeon family. The beluga is the largest freshwater fish in the world and late-maturing fish it can live for 118 year. The biggest Beluga ever caught weighed 1,571 kg and was 7.2 m long. This largest fish can reach more than15 feet long and weigh upwards of 2,500 pounds. Beluga are euryhaline it means they can swim freely between salt and fresh water. Beluga caviar is taken a delicacy worldwide and its air bladder can make the good isinglass.
The white sturgeon is one of the largest fresh water fish in the world. It is also known as the Pacific sturgeon, Oregon sturgeon, Columbia sturgeon, Sacramento sturgeon, and California white sturgeon. white sturgeon is the largest freshwater fish in North America and it is the third-largest species of sturgeon followed by beluga and the kaluga. It can reach to a maximum size of 816 kg (1,799 lb) and 6.1 m (20 ft). It’s internal bone structure is more like as shark.
Giant Freshwater Stingray
The giant freshwater stingray is one of the largest fresh water fish in the world, it is a species of stingray in the family Dasyatidae. It can reach over 1000lb and 15 feet long. The spine is the largest of other stingray species. The giant freshwater stingray is endangered due to fishing and the construction of dams.
Catfish are a diverse group of ray-finned fish and largest breed is the Mekong Giant Catfish from South Asia. It can reach sizes of over 660lb and 10.5 feet long. Mekong giant catfish lives mainly in the lower half of the Mekong River system, in Cambodia, Laos, Thailand, and Vietnam. Mekong Giant Catfish distingushied by the the near-total lack of barbels and the absence of teeth.
Alligator gar are ray-finned euryhaline fishes, they are heaviest in the gar family and also among the largest freshwater fishes in North America. It can breathe both air and water. It reaches 10 foot and 200lbs at maturity. It have retained a few morphological characteristics of their earliest ancestors with seemingly no apparent changes so Alligator gars are often known as “primitive fishes”, or “living fossils”.
The arapaima are large species of bonytongue found in Amazon and Essequibo basins of South America. They are an important food fish. The fish can reaches to eight foot in length, and weigh over 300lb. They have declined because of overfishing and habitat loss. arapaima also referred to as a living fossils.
Paddlefish are basal Chondrostean ray-finned fish. They are similar to sharks and it shares similarities with sharks, such as fin shape and skeleton. There are two species coming under these creatures, the Chinese paddlefish and the American paddlefish. Chinese paddlefish 9-10 feet in length and American paddlefish can grow to around 5 feet.
The Nile perch is a species of one of largest freshwater fish in family Latidae of order Perciformes. It is Africa’s largest freshwater fish. This fish can reach to over six foot in length and 200lb size. The species have good commercial importance as a food fish and it is alsofamous with sport anglers.
The taimen is a species of salmon family and found in freshwater rivers and lakes of Russia, Mongolia and Central Asia. The fish can growing to over six foot and over 200lbs weight so it is the largest species in the salmon family. The taimen is a popuylar game fish, particularly for fly fishermen.
Carp are various species of oily freshwater fish from the family Cyprinidae. It is one of the largest fish water fish in the world. It is widely used as human foodstuff. Carp are native to Europe and Asia, but they were introduced to the USA. Giant Barb is the largest species founded in Southeast Asia.