Australia is home to some of the world’s most beautiful reefs. This includes the lush Great Southern Reef, which wraps around Australia’s southern coastline, and the world-renowned Great Barrier Reef.

Biologists thought that marine heat waves lowered urchin reproduction only at lethal temperatures. A new study shows reproductive shutdown even earlier. Sea urchins are a key but often destructive ...

Add Yahoo as a preferred source to see more of our stories on Google. A sunflower sea star may be about to snack on some sea urchins in California. Brent Durand/Moment via Getty Images Before 2013, ...

Sea urchins occupy a pivotal niche in coral reef ecosystems by grazing on algal turfs and preventing overgrowth that would otherwise inhibit coral recruitment and growth. The long-spined urchin ...

New research has uncovered a mass die-off of sea urchins living in the Canary Islands—one that could signal an ongoing marine pandemic. Reading time 3 minutes An apocalyptic serial killer of sea ...