Drop in Shark Numbers Startles Researchers Many species of shark are in decline, a development some researchers have been slow to note. The shark plays a pivotal role in the health of all marine life, and some fear the population dip could throw the underwater ecosystem out of balance. NPR's Richard Harris reports.
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Drop in Shark Numbers Startles Researchers

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Drop in Shark Numbers Startles Researchers

Drop in Shark Numbers Startles Researchers

Drop in Shark Numbers Startles Researchers

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  • <iframe src="https://www.npr.org/player/embed/923750/923751" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">

Many species of shark are in decline, a development some researchers have been slow to note. The shark plays a pivotal role in the health of all marine life, and some fear the population dip could throw the underwater ecosystem out of balance. NPR's Richard Harris reports.