Twenty pint-sized predators—the first of their kind to be bred in captivity and released into the wild—are now crawling around the San Juan Islands. The colorful sea creatures are called sunflower ...

Stars twinkle overhead, but under the sea, stars huddle together. Sea stars, that is! Sea stars (Asteroidea), commonly known as starfish, are invertebrates called echinoderms — creatures with hard, ...

Riah Evin, a biologist at the California Academy of Sciences’ Steinhart Aquarium, propagates endangered Sunflower Sea Stars on Nov. 20 in San Francisco. (Karl Mondon/Bay Area News Group) For the last ...

Starting in 2013, sea stars along the Pacific Coast began dying by the billions. Their once full and vibrant arms shriveled, twisted, and fell off. Within a few days, what was a living, colorful ...

A sunflower sea star may be about to snack on some sea urchins in California. Brent Durand/Moment via Getty Images Before 2013, divers on North America’s west coast rarely saw purple sea urchins. The ...