Struggling Tri Color Goniastrea with something sticking out of its mouth. Help?

[imanewberry]

This Tri Color (or no color right now) Goniastrea was the first coral I put in my tank about a month ago. I’ve posted pics of when I first got it and a pic from just a few moments ago (immediately AFTER spot feeding a few corals reef roids). It has lost all color and has stopped showing its tentacles at night. There’s also something sticking out of the heads mouth and I am unsure of what it is. The mouth doesn’t open and close depending on the time of day like it did for a while because of whatever is sticking out of it. I’ve read multiple times over that if there is still flesh then there is still a chance at bringing it back, but I am new to this and would like opinions please. Thanks!


Note: Water parameters are good. My main objective has been maintaining stable parameters and all of my other coral (including a couple SPS and LPS), inverts, and fish are as happy as a clam.

 

[najer]

How much flow is it getting, have you moved it or changed anything?

 

[reef lover]

Is there flesh left or is it just skeleton?