What is this???

[revautosports]

 

[madamo]

Maze Brain

 

[Malum Argenteum]

Yes, looks like an Oulophyllia to me.

 

[icu2]

Oulophyllia crispa

 

[Hormigaquatica]

Judging from the hand in the background, I think the polyps are too small, too convoluted, and too angular to be Oulophyllia. My thought would be either Goniastrea or Platygyra.

 

[zeppelin]

I second Goniastrea.

 

[Malum Argenteum]

OK, yes -- Gonastrea. Not Platygyra, for sure, since the corallite walls are too sloped (more vertical in Platygyra).

 

[MinibowMatt]

Platygyra--
heres the aims pic:

here the OP's

here is the goniastrea favulus -- the closest goni sp. IMO.

 

[Malum Argenteum]

Sigh...the trials and tribulations of amateur taxonomy..I'm going to keep reading...

 

[zeppelin]

Goniastrea australiensis, I would bet. Here is a pic from aims:

and here is one I got last summer in an aussie shipment listed as such.

 

[roblack]

I put a vote in for O. Crispa.

 

[icu2]

Rather an insane price it is currently going for IMO.