My lemon yellow is swimming with one fin clamped more often than not clamped. He's still feeding and moving with the others, breathing isn't rapid but normal. Was sitting at the back of the tank earlier but came out for a snack and been out since. I. can't see any tears or blood spotting. Other than this he seems happy. Did a 50% wc yday evening with heated aged water. I was wondering if he might have flukes but he's not rubbing or anything else. Any suggestions? On the upside my San Mara fed from my hand today, I was absolutely thrilled.