I'm 99% sure that is a H. crispa (sebae anemone). The verrucae(bumps on the under side) on M. doorensis(LTA) are not as random as on your anemone. In the second pic it looks like you can see the foot. If it were an LTA, the foot woud be red/pink. There are too many tentacles for an LTA. The length of the tentacles is a function of the animal being in captivity. It is not unusual for a H. crispa in poor health to have its tentacles shrink down to just bumps. In the wild, an LTA has tentacles that are nearly twice as long of H. crispa, so I don't quite get the reasoning that the tentacles are not long enough for a sebae so it might be an LTA. H. magnifica have verrucae, but they are not nearly that prominant and the column of a magnifica is not that leathery texture, nor is it that color white.