The LFS said and priced it as a LTA, but one ppl from this forum has the same ane. as mine (looks exactly the same, forgotten which post) and he mentioned that it is a "sand ane."
I never manage to let it attaches to rock inside my tank since there are corals everywhere and now I somehow barricaded it on sand in the middle of the tank so that it wouldn't blow away by water current and land on corals.
i would say lta...and its going to be unhappy as it cannot move anywhere to find a position that it likes...you may need to just let it go and see where it settles at...its would be better to move a coral, than have the nem go bad...