These urchins may decorate themselves with algae and shell bits for protection. The sea otter is one of the main natural predators that eats sea urchins. Because sea otters are endangered, urchins ...

Like other urchins, the red sea urchin has a dome-shaped shell called the “test” covered in spines. Its test is also covered with tube feet that it uses to move and bring food to its mouth, at the ...

By nurturing sunflower sea stars in captivity, researchers aim to one day restore a key predator to the Pacific Ocean.

California’s offshore seafloors have been missing a massive, colorful predator that keeps kelp-munching sea urchins in check.

For the last decade, California's offshore seafloors have been missing a massive, colorful predator that keeps kelp-munching sea urchins ... return would curb purple urchin populations and allow ...

That their return would curb purple urchin populations and allow critical kelp forests to ... South of the Bay, they’re also ...

Riah Evin, a biologist at the California Academy of Sciences’ Steinhart Aquarium, propagates endangered Sunflower Sea Stars on Nov ... return would curb purple urchin populations and allow ...