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Contact: Elaine Bible
San Francisco State University

A Juvenile American Paddlefish

Caption: A juvenile paddlefish, just under three inches long at two months old. Fully grown American paddlefish can reach five feet (1.5 m) in length and have a protruding snout or "rostrum." A new study by researchers at San Francisco State University finds that the American paddlefish underwent a genome duplication 42 million years ago.

Credit: Diane Fenster/ San Francisco State University

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Related news release: Paddlefish's doubled genome may question theories on limb evolution

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