Bloated zebra danio

bloated danio

I have one very bloated zebra danio, everything else seems normal (activity and appetite) it has been a couple weeks now. Scales are not protruding. Does anyone have any ideawhat I can do?
 
If there were no protruding scales, (dropsy), then it might have had a digestion problem or constipation. I had that happen to a guppy once. dffd, try feeding it peas, that might help.
 
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