it actually is a dendronephthea. after SKremk's post, i researched it and found very similar pics.
one of the common names is cauliflower coral
it isn't slumped over because it wants more light, although this is what i thought too. turns out, it is a non-photosynthetic coral and they feed almost exclusively on phytoplankton.
sorry to say, i brought it back to LFS and traded it in for an easier to care for coral. apparently, dendronephthea are very hard to keep. they feed almost exclusively on phytoplankton. i really don't want to have to keep adding phyto to my display, for fear of contaminating my tank too much. plus raising live phyto is probably something left to more experienced reefers.
they also like to be hung upside down and are commonly found upside down in caves and low light. the white one i have (had) apparently is very sensitive to light. these corals have no protection from uv light.
anyways, sad to see it go but this is one of the mature moments in my reef keeping life where i just had to admit that im just not ready for this beautiful coral. i originally bought this coral from a LFS that had it in the "soft coral" section. it is a soft coral but i guess it was marketed that way since many of us have the general impression that soft corals are easy beginner corals. buyer beware!