What Coral is This?!?!

[My120gmixed]

Does anybody know what type of coral this is? It came on a rock that was given to me by a friend (some zoos are on the rock as and a couple palys recently started growing on there as well). The rock was thoroughly dipped so I doubt it is a pest of any sort. Apologies if the photos are bad :-(

I suspect it to be an lps coral because of its fleshy, disk like growth and small tentacles near the mouth of the coral. It is a dull red and green under my daylight and neon green with blue under actinics. It has grown significantly since when I got it because it was recently hardly noticeable. It started growing faster when a started dosing Acropower which leads me to believe it has a skeleton.

My tank is dominated by soft coral with some basic sps.

 

[cgdcinc]

Looks to be a mushroom.

 

[chowwil]

Can't really tell from the pic. Under blue light, it looks like a Blastomussa, not sure.

 

[sde1500]

Small meat coral maybe? Acanthopyllia