Is this an acan or chalice?

[undertai]

Is this an acan or chalice coral? Also do you know the real name of this coral?

Thanks in advance :D

http://www.webtrafficstats.com/reef/reeftank%205132009%20002_edited-1.JPG
http://www.webtrafficstats.com/reef/reeftank-5132009-003.jpg

[SeanT]

Looks like an acan.
Is it fleshy or hard.
If hard, possibly Acan enchinata.

[JRaquatics]

I would agree with SeanT that it is an Acan Enchinata. Be careful as it is very aggressive.

[undertai]

its kinda fleshly. You can see it move as the current blows across the top half of the coral. I know its aggressive as it as already killed a side of the favia I had kinda close to it. But I moved it as soon as I saw it attacking the favia.

[BlastoEric1589]

+1 acan echinata