Why has my coral retracted? What am I doing wrong?

[Seno2k]

I just introduced this new LPS into my tank. In its normal state, it has a number of longish tentacles that protrude out and sway with the water. However, ever since I’ve introduced it it’s been in this retracted state. Does anyone have any ideas as to what might be going on? I have no idea what I might have done wrong. For reference, it’s the coral on the left in the photo attached.

 

[EeyoreIsMySpiritAnimal]

Hi, and welcome! Let's see if we can figure this out.

Is it a torch?
How long has it been in your tank?
How old is your tank?
What are your parameters (nitrate, phosphate, alkalinity, calcium, magnesium, salinity, and temperature) and have there been any swings since you added the coral?

 

[EeyoreIsMySpiritAnimal]

Also, what kind of flow is the coral getting, and what type of lighting do you have?