Most coral reefs are in danger , according to estimates from the Nature Conservancy . The Great Barrier Reef is one of the most iconic natural wonders on Earth and home to some of the world's largest living things — including corals, sea lions, sharks, turtles and whales. Reef Balls are concrete spheres upon which a natural reef can grow . `` And that our grandkids will be able to see the same thing . '' The objects also help control beach erosion and stabilize shorelines .
Most coral reefs are in danger , according to estimates from the Nature Conservancy . The Great Barrier Reef is one of the most iconic natural wonders on Earth and home to some of the world's largest living things — including corals, sea lions, sharks, turtles and whales. Reef Balls are concrete spheres upon which a natural reef can grow . The objects also help control beach erosion and stabilize shorelines .