Introduction to Rapid Tissue Necrosis (RTN) and Slow Tissue Necrosis (STN): 

Tissue Necrosis and Slow Tissue Necrosis are used to describing an event of tissue coming off the coral or the coral turning white, which is known as bleaching. The speed at which this happens determines whether it is called rapid or slow tissue necrosis.

Rapid tissue necrosis happens when the coral is almost completely white within 24 hours.

Slow tissue necrosis can take days, weeks or even months.

There has been much discussed on what causes this problem.

It is thought to be caused by different strains of Vibrio bacteria.

 

What does a Vibrio Infection look like: 

You cannot see this bacterial infection with your eyes.

However, you can see the signs of the infection.


Signs of infection:
 

Rapid or slow loss of coral tissue revealing the bone of the coral. Typicaly seen is SPS corals.