So I was so exited when I bought my mandarin sunday. I have plenty of copepods in my tanks so I eagerly bought a mandarin. Well I was looking in my tank yesterday and he was lying upside down with his lips barely puckering. He was relaxed (not riggamortis) and I tried to pull him back and forth slowly to get his gills working. But it was like his entire nervous system just shut down. Im guessing he was a cyanide catch as nothing is wrong with my tank and I dont exactly have neurosystem attacking creatures in my tank. Im so mad because this is my first casualty ever, save for a flame scallop when I first got into the hobby.