I have a coral I purchased several months ago, the local fish store said it was a blastomussa. After some reasearch, it looks more like a candycane coral. There are two polyps. At night the deflate to the skeleton. Shortly after the lights are on the inflate to many times the size. The polyps are all one color. There are no feeding or sweeper tenticles. I do not feed it becuase it dosen't eat. It looks like a candycane or a trumpet coral, but with out the feeding and sweeper tenticles. It seems to be doing okay. I have had it for about six months. I can post pictures after my camera charges.