From Science Daily:
ScienceDaily (Mar. 27, 2009) — Large size and a fast bite spelled doom for bony fishes during the last mass extinction 65 million years ago, according to a new study.
Today, those same features characterize large predatory bony fishes, such as tuna and billfishes, that are currently in decline and at risk of extinction themselves, said Matt Friedman, author of the study and a graduate student in evolutionary biology at the University of Chicago.
"The same thing is happening today to ecologically similar fishes," he said. "The hardest hit species are consistently big predators."
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