I've got this 'thing' attached to my liverock. It is black & it has a head like a turbo snail. It has a movable mouthpart whereby it feeds. I observed it feeding today when it released some form of mucus out...the mucus captures food in the water like cyclops,etc. When it has caught enough, it would 'reel' in the mucus into its mouth...consuming whatever it has caught.
Anyone know what is this cute bugger?