That is a H. malu rather than a H. aurora
Here is a picture on the Net of the tentacles of a Malu
I've always gone off the following for identification of Heteractis anemones:
H. aurora: Short tentacles, occasionally longer at the perimeter of the oral disc, beaded or warty in appearance, rarely with colored tips. Column and underside of oral disc covered heavily in white verrucae. Sand dwelling
H. malu: Short tentacles, occasionally longer at the perimeter of the oral disc, smooth, tapered, occasionally with colored tips. Sparse to medium covering of white verrucae on underside of oral disc and column. Sand dwelling
H. crispa: medium to long tentacles, uniform in length, smooth, strongly tapered, occasionally with colored tips. Sparse verrucae on underside of oral disc and column. Typically rock dwelling
H. magnifica: medium length tentacles, uniform in length, smooth, can display either tapered or rounded tip, occasionally with colored tips. Column can be brightly colored, sparse verrucae. Rock dwelling
Judging by the tentacles (which were much more 'beaded' at the LFS) and the heavy covering of verrucae, I'd say this squarely falls under aurora. Even the picture you posted comes up under Heteractis aurora on Google haha.