The Great Barrier Reef's most notorious coral killer may actually be helping it

Crown-of-thorns starfish are notorious for devouring coral reefs, but surprising new research reveals these spiny predators may actually help reefs thrive when their populations are kept in check. Scientists studying Australia's Great Barrier Reef discovered that nearly 75% of observed starfish feeding events left behind living coral tissue, rather than destroying entire colonies. By feeding on fast-growing, dominant corals, the starfish create opportunities for slower-growing species to survive, potentially increasing coral biodiversity.