Study Unravels Why Certain Fishes Went Extinct 65 Million Years Ago

Large size and a fast bite spelled doom for bony fishes during the last mass extinction 65 million years ago. Today, these same features characterize the large predatory bony fishes, such as tuna and billfishes, that are in decline and at risk of extinction. They appear to be the least able to rebound from declining numbers due to overfishing.

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