I have had this little guy, Melanarus, for about 6 weeks. Got him from the LFS. He has been eating and hiding under the sand and swimming around randomly. I did a %15 water change today and this evening as the lights were dimming to off I noticed him in the corner. I had removed the air stone because I repositioned My pump I thought that I had enough air? I immediately hooked it back up!! I don't see any spots he is not bloated.... My 2 pairs of clownfish are doing fine as well as my bubble tip. I have a Duncan coral as well that is doing just fine my water levels are good is this normal behaviour or do I need to go buy something? Very new to this any help would be greatly appreciated!!!