I have a Bubble Eye Goldfish in a 55 gallon tank with other Fancy Goldfish. I noticed today that he is missing one eye. I have never seen aggression in this tank and doubt it is from that. Perhaps he banged into a rock? Or got caught in the filter?
Any ideas of what could cause this? Is this common? Any steps that I should take?
Any ideas of what could cause this? Is this common? Any steps that I should take?