White spots on Favia.

[Proteus]

Name: White Pox / White Spot

Symptoms: The coral will start to show white spots at random on its surface. Over a short period of time, more and more spots will appear. Most of the time, these spots will come to form a band across the coral’s surface, but this doesn’t happen in all cases. These white spots will increase in size very quickly as the bacteria starts to consume the coral’s tissue. This is most commonly found on SPS and some LPS corals. It is very difficult to tell the difference between this disease and damage due to fish / invert bites. It has been found in both LPS and SPS corals.
Cause: It is caused by a gram negative bacteria called Serratia marcescens