This lavishly illustrated book explores the concept of reef ecosystems and its characteristics. It provides a conceptual description of reefs and their functions. This compilation also outlines the general species composition and structure of coral reefs and their corallobionts. Described and illustrated are the main inhabitants of the reef community. Various types of reefs (fringing, barrier, platform etc.) in different regions of Vietnam, along with their conditions and statuses are catalogued as well. Reef ecosystems traced under anthropogenic influence and the impact of typhoons are included. This book shows the possibilities of artificially cultivating corals and the rebuilding of their communities.