Correspondence analysis plot showing the relationships between clone libraries from mucus, tissue and skeletal samples of the corals, A. millepora and M. aequituberculata, and the main sulfur-degrading bacterial genera isolated in the present study. AM, A. millepora (tissue or mucus libraries); MA, M. aequituberculata (tissue or mucus libraries). Total inertia = 1.5586, chi2 = 427.37, df = 42, P = 0.000.