Do you have any pics of the underside? If you were referring to Stichodactyla gigantea I would say no, a) they do not split, and b) it doesn't look like a gig. I think it's either a H. Magnifica or a BTA. Based off of theese pictures and how low the nem is on the rockwork I am leaning towards BTA.
Although It could also be a LTA. Now I'm not too sure.