ID this coral
 

please help me id the coral in the middle of the picture

http://www.canreef.com/vbulletin/pic...pictureid=4753

Thanks

Purple Acropora. :D

You would need to get a close up pic of the corallites and growth tips in order to ID to the specie level, even then it's a best guess as many can only be positively identified by experts (read: people with letters after their name lol). Some SPS species are fairly easy to ID though.