Beneath sea urchins’ exterior spines, rounded skeletons called tests are jewels of color, texture, and symmetry. There are hundreds of urchin species, and they’re found in every ocean on ...

A species of sea urchin is turning parts of the south-eastern ... deeper depths we don't have sufficient data. So analysing photos from deeper water habitat is just part of building the picture ...

As coral reefs struggle to adapt to warming waters, high levels of pollution and sea-level rise, ballooning sea-urchin populations are threatening to push some reefs in Hawaii past the point of ...

The long-spined sea urchin—a fist-size ball of black defensive ... Team Microscope pulled up their slides to reveal clear images of ciliates infesting the spines and bodies of the urchins.

“As soon as I saw the two pictures, I realized that this is more or less the same,” he says. So, in the new study, Abdelgalil and his colleagues illustrated how key components of the sea ...

A healthy forest of giant kelp, in Monterey Bay. (Photo by Michael Langhans) In this urchin barren in Monterey Bay, grazing by purple sea urchins has removed kelp and other algae from the rocky reef. ...

I was lonely. Something needed to change. That’s how I found myself diving for sea urchin. I’d had uni before, but it was probably treated with alum as a preservative. I didn’t want that.

The edible part of the sea urchin known as uni has earned its status as a high-end sushi bar treat in Japan and now pretty much everywhere else. But sea urchins have been long fished and harvested ...