Hi all, I saw this cute something at a LFS. Upon close inspection for a minute, he said it's something like a pulsing coral, and I bought it thinking it's would make nice coral. When I put it in my tank within a minute it disappear. Looking around I saw it crawling like a snail. It dawns on me that it's not a soft coral; it must be a nudibranch of some sort. It crawls all over my tank, and finally settling right in front of the water stream not moving anywhere (it's a 10 gallon tank--JBJ nanocube--so the stream is not all that powerful.) It sits on top of the magnetic cleaner in front of the stream. I turn the cleaner around, and it crawls back to the side with the stream blowing at it. Could you guys please id this animal, and what does it eat? I wonder what functions those frilly appendages on its back perform?