Inside-out Mushroom ?

[Smokinafuente]

Any idea what this guy is doing? After a few hours he went back to normal.

 

[fishfreek]

Expelling its guts.

They will do that when stressed.

 

[Smokinafuente]

Thats weird. I've had it for about 3-4 months and it has never done that before, that I've seen. I did add a bubble coral a week or two ago (about 5" behind it), to you think that the bubble was it freeked out?

 

[Anemoneman]

Even stirring the water up nearby will do it. Touching them will do it. Other corals nearby will cause it. Pretty normal defensive behaviour.