Because of the wide water surface, there are many kinds of fish in the ocean. There are many large fish living there, but in freshwater waters, due to various reasons, it is usually rare to see fish weighing more than 100 kilograms.
Among living fish, the largest individuals should belong to the fierce fish such as whale sharks, basking sharks, and sharks among sharks. It is said that the largest whale shark can reach 20 meters in length and weigh 20 tons. Basking sharks are slightly smaller than whale sharks and are more than 15 meters long. In the vast ocean, you can often see groups of sharks that are about 10 meters long and weigh about 5 tons swimming on the sea surface.
Among freshwater fish, the largest individual should be the sturgeon. The white sturgeon unique to my country's Yangtze River should be the champion. According to records, a 7-meter-long Chinese sturgeon was caught in Nanjing in 1929. In 1892, it was recorded that a Chinese sturgeon caught in the Yangtze River weighed 907 kilograms. It is still the longest and heaviest freshwater fish in the world. The Chinese sturgeon in the Yangtze River and the catfish in the Heilongjiang River should be the heaviest fish. The heaviest record of the Chinese sturgeon is 907 kilograms, and the individual catfish is also over 500 kilograms.
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