I noticed this on one if my frag plugs a week or 2 ago. It wasn't moving or consuming anything so I didn't think much of it. Last night I was looking at things and saw it had cleaned up part of the frag plug as was moving slowly. It had doubled in size also. The bottom part appears to be how it moved and eats so I assume some type of snail? The two sections above appear to be it's shell. When I first saw it there was only 1 section of that and now it has grown to 2 sections. It is about 3/8 inch in size. It seems to be staying on the plug and so far the coral doesn't seem to be bothered.




