Researchers said Honaunau Bay now has an average of 51 sea urchins per square meter. This is considered to be the highest ...

The turquoise water of Hōnaunau Bay in Hawaii, an area popular with snorkelers and divers, is teeming with spiny creatures ...

With its ability to grow to as big as three feet across, armed with up to 24 limbs covered with tiny suction tubes, the ...

Sea urchins have mixed reviews in the saltwater aquarium scene. Some people love them because they are fascinating to watch ...

Black sea urchins feed on the algae that grows on the reef. Bronstein said they’re sometimes called the gardeners of the sea for that reason. Algae competes with coral for sunlight.

The black sea urchin is critical to maintaining a healthy reef habitat. Without them, algae grow unchecked, choking off corals and compromising the delicate balance of the reef ecosystem.

The long-spined sea urchin (Diadema antillarum) is a key algae grazer in the Caribbean. A disease outbreak in the 1980s killed off most of the urchins, resulting in the overgrowth of many ...

He and Pilnick found that even sparse adult urchins—just one urchin for every six and a half square meters of reef—can curtail algae. “I mean, these things eat a lot. It’s kind of amazing.” ...

Experts rush to understand cause of mass die-offs in Red Sea of keystone species that feeds on algae, as pathogenic parasite spreads quickly, killing the creatures within 48 hours ...

Diadema, a Caribbean sea urchin, has suffered two massive dieoffs in recent decades. Florida scientists are trying to help them thrive and save our coral reefs. Florida scientists using algae ...

The urchin-rearing efforts share space with other projects run by the Florida Aquarium’s Conservation Campus. In one bright, spacious lab, rescued sea turtles with illnesses and injuries peer ...

The tanks are now covered in the algae the sea urchins normally eat. When we visited, a lone young sea urchin remained in the tanks that once hosted dozens. But these creatures are the kind that ...