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 ...

A few weeks ago, Sarah Gravem lowered a “ravenous, terrifying predator” from her boat down to the ocean floor off Sitka. Then she released it. In a slow-motion drama, sea urchins fled as a pizza-size ...

Graduate student Nikita Sridhar shows the underside of a sunflower star, with stomach protruding and urchin spines stuck to its arms. (Meredith Redick/KCAW) Alaska has no shortage of marine predators ...

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 ...

A sea otter floating above ribbons of kelp is undoubtedly one of nature’s cutest scenes. It’s well known that the marine mammals help make these sea surface ‘pillows’ more abundant, by eating the sea ...

​Researchers, who published their findings in Science, discovered that these algae emit allelopathic compounds into the water ...

Sea urchins are devouring California’s coastal kelp faster than it can reproduce, researchers said. Photo by Portuguese Gravity on Unsplash California scientists are declaring war on sea urchins. The ...

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