The Mesoamerican Reef is an ancient treasure – dating back 225 million years – that provides a unique and valuable service to plant and animal species living along its shore. Its many benefits extend from central Mexico down through Central America. The second longest barrier reef in the world, the reef serves as a natural barrier to storms and hurricanes - and is critical to the survival of the more than 65 species of coral and 500 species of fish that call it home.