I noticed tonight that all 3 of my koi angels seem to be rather bloated (unless exceptionally fat is an option). The pic attached is the worst of the 3, and all other (non angel) fish in the tank look fine. Sorry the pic is dark, they are in a 46 bow and they insist in being front and center (out of the light) when I'm near the tank in case im going to feed them . All are aggressively eating and all are extremely active. Anything I should worry about here, and if so, what do you suggest doing?
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