So I have two ryukin goldfish that I just moved into a 55 gallon tank today from a 30 gallon tank and in the process of moving them I happened to notice that one of the has this spot on it’s side. The water is good but I have noticed that when they are feed they nudge each other out of the way but that’s about it. Could the other one be doing this and what could I do? Any help on this topic would really be apreeciated.
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