Mystery pathogen is stripping sea urchins of their flesh and turning them to skeletons — and it's spreading fast

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Mystery pathogen is stripping sea urchins of their flesh and turning them to skeletons — and it's spreading fast
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A mysterious epidemic that began in the Mediterranean at the start of the year looks set to wipe out all of the Mediterranean and Red Sea’s urchins, and possibly their coral reefs too.

A sudden and deadly epidemic sweeping across the Red Sea has killed an entire species of sea urchin, stripping their flesh and turning them into skeletons.

"It's a fast and violent death: within just two days a healthy sea urchin becomes a skeleton with massive tissue loss," Omri Bronstein, a senior lecturer in Zoology at Tel Aviv University, said in a statement."While some corpses are washed ashore, most sea urchins are devoured while they are dying and unable to defend themselves, which could speed up contagion by the fish who prey on them.

The disease was only identified after a second wave hit the Caribbean in 2022, an event which gave scientists a second opportunity to study it. The imperilment of the region’s corals is significant on both a local and global level. The Gulf of Aqaba is known for its numerous diving spots and is a popular tourist destination. And because the corals there evolved to high temperatures and salinity over millions of years, they are more resistant to climate change-driven temperature fluctuations that are killing off other coral reefs around the world.

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