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Are sturgeon really the largest freshwater fish?

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Welcome to CoreFacts, where we're always short on time and big on science. I'm Jessica Robertson. Today's question is an interesting one.

Are sturgeon really the largest freshwater fish?

The answer is yes. The beluga sturgeon in Russia is the largest fish in the world that can be found in freshwater. In North America, the white sturgeon is the largest freshwater fish. They have been reported to reach lengths of 15 feet or more. The second largest freshwater fish in North America is the alligator gar.

And now you know. Join us again every weekday for a new CoreFact. For other CoreFacts, or for CoreCast, our in-depth science podcast, go to If you'd like to have a question featured on our show, give us an email at or a phone call at 703-648-5600. Remember, long distance fees do apply.

CoreFacts is a product of the U.S. Geological Survey, Department of the Interior.

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