Learn all about what coral reefs are, their role in the ecosystem and why coral reefs are in danger.  What is coral bleaching?  How does ocean acidification, pollution, runoff, overfishing, destructive fishing practices, coastal development, tourism and coral disease all affect coral reefs?  What can be done to help coral reefs?  The answers to all of these questions and more are covered in depth with exciting video and dynamic graphics that reinforce important concepts.