Echinata or Acropora tenuis or ???

[Dave & Monica]

This is my favorite coral, and I'm not 100% certain what it is. It was given to me as Echinata, but the more pics I see of Echinata, I think it may be a Acropora tenuis

 

[Frick]

I do not think it's either echinata or tenius.
http://coral.aims.gov.au/speciesPages/species_metadata/0026/view#
http://coral.aims.gov.au/speciesPages/species_metadata/0074/view#

I am thinking A. cerealis.
http://coral.aims.gov.au/speciesPages/species_metadata/0016/view#