These nems are just your standard Entacmaea quadricolor bubble tip anemone, although from a captive strain. Wild caught E. quadricolor are usually much more fragile than captive-split specimens for whatever reason, so it's always better to get captive ones even though they can cost a bit more and can be harder to find. Similarly, attached anemones fare better, so never ask for one to be removed from a rock (better for the nem's survival to just buy the rock too). Most captive-propagated nems I've seen for sale have actually arrived at the stores on small pieces of rock already. Obviously if they're on the glass it's another matter, but it's a lot easier/safer to remove one from the glass than a rough surface like a rock.
Strains within this species are a funny thing from what I've seen and discussed with other hobbyists. Some bubble a lot, some won't. I've seen mine bubble when regularly poked at (i.e. when hosted by a clown), but otherwise they un-bubble. Mine are also very food-oriented. The food attitude seems to have little to do with lighting; they will often prefer to sit under a ledge in the shadows if it gets them food more easily. If I forget to feed them for a few days or have had to go out of town for a while, they get sticky to the point where it's hard to get them off my hand if they snag it and it can leave a red mark too. On the other hand, other BTAs I've seen and heard about may not even accept food and aren't sticky at all. Perhaps not surprisingly, those anemones are also often the ones that prefer bright lighting and might even bleach and fail in the sort of lower-end lighting under which mine are thriving. There is a lot of variability, which is part of what makes them tricky animals.