Bought this anemone a couple years ago as a RBTA from a local fish store. It quickly took up residence in a rock/crevice, has never moved or split and probably quadrupled in size (I would estimate extended disk at about 11" with tentacles extending well beyond that). While it is stunning in movement and coloration, I've never seen the tentacles bubble like so many of the pictures here - usually long, stringy with sometimes some crazy looking clumping/zigzag/tangles. The foot and disk are white/offwhite. Is this a rbta, something else or no way to know?

I can take more pictures for someone of anything specific if that is helpful.

