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How large can a beluga sturgeon grow?

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Russian sturgeon (Acipenser gueldenstaedtii) — chondrostean Russian sturgeon (*Acipenser gueldenstaedtii*) swimming along the seafloor of the Black Sea.

The beluga (Huso huso), also known as the hausen, is the largest freshwater fish in the world. It can reach a length of up to 8 metres (26.2 feet) and weigh as much as 3.2 metric tons (3.5 short tons). While specimens of this size have been observed, they are considered far less common.12