Common signs of infected coral.
1. Discoloration – loss of normal coloration in part or the whole coral, including bleaching of tissue or darkening of the coral skeleton or green pigmentation on the coral skeleton.
![](https://coralrtn.com/wp-content/uploads/2018/12/IMG_1460-1024x768.jpg)
![](https://coralrtn.com/wp-content/uploads/2018/12/IMG_1461-1024x768.jpg)
![](https://coralrtn.com/wp-content/uploads/2018/12/IMG_0966-1024x768.jpg)
![](https://coralrtn.com/wp-content/uploads/2018/12/IMG_0963-1024x768.jpg)
![](https://coralrtn.com/wp-content/uploads/2018/12/IMG_E0995-1024x646.jpg)
![Coral Bleaching From Parasites](https://coralrtn.com/wp-content/uploads/2018/12/Coral-Bleaching.jpg)
![](https://coralrtn.com/wp-content/uploads/2018/12/IMG_1955-1024x768.jpg)
![](https://coralrtn.com/wp-content/uploads/2018/12/IMG_0991-1024x768.jpg)
![](https://coralrtn.com/wp-content/uploads/2019/04/81CA3-1010x1024.jpg)
![](https://coralrtn.com/wp-content/uploads/2019/04/39A41-1024x931.jpg)
2. Closed Polyps – prolonged polyp retraction
![](https://coralrtn.com/wp-content/uploads/2018/12/polyp-retracted-1-1024x733.jpg)
![](https://coralrtn.com/wp-content/uploads/2018/12/IMG_E0983-1024x876.jpg)
3. Tissue Loss – brown jelly, STN, or RTN
![](https://coralrtn.com/wp-content/uploads/2018/12/brownjelly.jpg)
![Slow Tissue Necrosis Coral](https://coralrtn.com/wp-content/uploads/2018/12/STNcoral-1024x768.jpg)
![](https://coralrtn.com/wp-content/uploads/2018/12/IMG_1511-1024x768.jpg)
![](https://coralrtn.com/wp-content/uploads/2018/12/IMG_0984-1024x768.jpg)
4. Melting tissue – soft coral tissue melting.
![](https://coralrtn.com/wp-content/uploads/2018/12/DSC06951-1024x768.jpg)
![](https://coralrtn.com/wp-content/uploads/2018/12/Melting.jpg)