Is this bubble coral dead?

[Deep Reef]

About 3 weeks ago I picked up this bubble coral and placed it into QT. It opened the first few days and hasn't opened since. See attached picks..




I spot feed it about once a week but there appears to be no response.

How can I tell if it is dead?

 

[Scotty1772]

Dead as a door nail

 

[akitareefer]

Dead. Look up pink line syndrome. What kind of quarantine are you running? Parameters?

 

[tanked_life]

I spot feed my bubble coral everyday, healthy as can be except for the fact that his mouth is always showing. What were your water perimeters ?

 

[slgcmg]

I never spot feed mine and he looks great. Has to be a param issue

 

[skyline377]

Pull the plug it is gone!!

 

[R.ahlskog]

No tisue = dead