What is this Coral?

[Zoaelite]

Originally Posted by Snappy

It's not porites, that is actually a variety of Siderastrea sp. which is considered an LPS. They can extend fairly long sweepers at night so give it some room.

Its not an acan/micro 100%, I was leaning towards porites but Greg is usually right when it comes to coral ID'ing so I would go with it being a Siderastrea.
Levi

*EDIT*
This is what a Siderastrea Sp. looks like (Thanks to google)