IE 11 is not supported. For an optimal experience visit our site on another browser.

Sharks have become ‘functionally extinct,’ new study finds

05:01

As TODAY’s Shark Watch series continues, NBC’s Kerry Sanders reports from Lauderdale-by-the-Sea, Florida, where a massive research project is underway to find out why sharks have been disappearing from coral reefs around the world – and what their “functional extinction” due to overfishing could mean for our oceans.