Coral reefs are nurseries of the ocean.
Healthy reefs are vital for human health. Divers can be the difference between a healthy reef and a tragedy. Coral reefs are a vital component of ocean ecosystems, providing shelter for nearly one quarter of all marine life. Coral reefs are among the world's most fragile and endangered ecosystems. Coral reefs are threatened by global warming, overfishing, coastal development, sewage, agricultural runoff, improper marine recreation and a variety of other human-related problems.