Life Reef sharks are being wiped out by overfishing so rays are taking over A global survey reveals that common species of coral reef shark are in sharp decline, and rays are more abundant in reefs where sharks have been depleted NewsFree
Environment Coral reefs have conveyor belts of mucus running across their surface Tiny cilia on coral reef polyps coordinate to generate currents that run across the reef surface, perhaps to carry food to all colony members NewsFree