Cover photograph (Copyright © 2007, American Society for Microbiology. All Rights Reserved.): In light of the recent dramatic decline of coral reefs worldwide, a better understanding of the factors (biotic and otherwise) contributing to coral health is needed. In this photograph (taken at a depth of 8 m), branching (background) and digitate (foreground) species of acroporid coral from the Great Barrier Reef can be observed. In their article, Yarden et al. describe the changes in fungal prevalence in acroporid corals once diseases set in. (See related article on page 2755.)