Half a century of rising extinction risk of coral reef sharks and rays

Sharks and rays are key functional components of coral reef ecosystems, yet many populations of a few species exhibit signs of depletion and local extinctions. The question is whether these declines forewarn of a global extinction crisis. We use IUCN Red List to quantify the status, trajectory, and threats to all coral reef sharks and rays worldwide. Here, we show that nearly two-thirds (59%) of the 134 coral-reef associated shark and ray species are threatened with extinction. Alongside marine mammals, sharks and rays are among the most threatened groups found on coral reefs.

The issue of global biodiversity loss is so intense in the present era that it cannot be ignored as according to the reports of Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES), due to human actions an average of around 25 percent of species in assessed ani