Purple sea urchins, beware: There’s a purple urchin-eating predator on the horizon — and its name is the sunflower sea star. That’s the plot line coming from a small upstart research facility in Moss ...

Before 2013, divers on North America's west coast rarely saw purple sea urchins. The spiky animals, which are voracious kelp ...

Scientists say they’ve found the cause of a marine epidemic more than 10 years after it started. What took so long?

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 ...