what the heck is this????

[Stylaster]

ok after 20 years i have never seen this coral before that i picked up. Bought as an acropora craterformis, but im not so sure. Im thinking astreopora. Any ideas???
I am positive this isnt cyphastrea already checked into that possiblity

 

[Frick]

Definatly not a Acropora crateriformis

Maybe a Montipora sp. http://coral.aims.gov.au/speciesPages/species_metadata/0263/view#
or a Turbinaria http://coral.aims.gov.au/speciesPages/species_metadata/0358/view#