| Opening | Introduction | The Key | Specific Diseases | Reading | Links | You Can Do | Contact Us |
Diseases of hard corals become obvious to humans as a result of changes in the appearance of the coral, including changes in color and changes in shape or form. These changes can be used to distinguish between the various diseases that have been described thus far. This key begins by separating color changes from changes in shape or form. Please choose between the two options below.
| Changes in color | Changes in shape or form |