A massive new survey of nearly 400 coral reefs around the world reveals sharks once common in those waters are vanishing, a troubling sign that the fearsome fish are at a much greater risk of going extinct than previously thought.
“It’s absolutely jaw-dropping,” said David Shiffman, a marine biologist at Arizona State University not involved in the survey work. “And it’s telling that if you look at all the reef sharks at all the reefs everywhere, you get a very similar pattern.”
When he started surveying, Colin Simpfendorfer, a shark scientist at James Cook University in Australia, wasn’t expecting to see such severe declines, but the final measurements were sobering.
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