Across tropical and subtropical seas, a quiet biological crisis is unfolding as vast populations of reef‑grazing sea urchins ...

Sea urchins are ecosystem engineers, the marine equivalent of mega-herbivores on land. By grazing and shredding seaweed and ...

A mass sea urchin die-off has pushed Canary Islands populations to historic lows, with scientists warning of long-term reef ...

Researchers report catastrophic population losses from the Canary Islands to the Caribbean, warning of severe ecological ...

Sea urchins are dying across the Caribbean at a pace scientists say could rival a mass die-off that last occurred in 1983, alarming many who warn the trend could further decimate already frail coral ...

Considered a delicacy in several parts of the world, sea urchin, or uni in Japanese, is prized for its unique flavor. But the cost of the gonads — the orange tongues found inside an urchin — is steep.

A silent global pandemic is causing a mass die-off of sea urchins. Discover the mystery pathogen threatening marine ...

In Northern California, purple sea urchins are decimating kelp forests. Though the species of urchin causing problems may vary by region, the damage is the same. NNehring/iStock This article is from ...

Every summer, millions of people head to the coast to soak up the sun and play in the waves. But they aren’t alone. Just beyond the crashing surf, hundreds of millions of tiny sea urchin larvae are ...

Sea urchins, prized for their edible gonads, resort to cannibalism when starved and forced into overcrowded tanks, according to new research. There are no documented reports of cannibalism among wild ...

Jon Holcomb had been diving for urchins for more than three decades, but he’d never seen a downturn like the one that started in 2013. The valuable red urchins that lived off the coast of northern ...

Sea urchins are dying off worldwide from an unknown disease, threatening reef balance and sparking urgent efforts to identify the pathogen.