Something is in my Corals Skeleton

[stacksoner]

I think there may be something else going on here as the entire colony seems to be hunkering down

 

[Flippers4pups]

Noob question but what makes barnacle so bad?

Barnacle in itself isn't bad, in this case it's growing on the head and irritating the tissue.

 

[GarciaCO]

Barnacle in itself isn't bad, in this case it's growing on the head and irritating the tissue.

Hello thanks to everyone. My hammer is slowly opening more each day.
Also I have an AI Prime and how does blue lights help a coral grow more. Is it nessecary to have the blue lights?
I have included a picture of my current setting on my tank and of my coral slowly opening more.

 

[Ralph Ritoch]

Looks to be a barnacle possibly. Remove it.

I agree that its a barnacle but better to leave it alone. I had them on my torch corals and removed them. The coral never recovered, and finally died from red algae.