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Why is my goldfish's eye cloudy and bulging? What should I do?

Updated On September 23rd, 2025

I have 3 goldfish. I noticed that only one of my goldfish has his eyes popping out and I noticed it getting cloudy. Is this normal or is it something I should be concerned about?

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1 Answer

Most Helpful Answer

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Answered By Dr. Massimo Orioles, DVM, Cert AVP, MRCVS

Veterinarian

Published on February 15th, 2019

Gas in or behind the eye, and other conditions, such as gas supersaturation (gas bubble disease - excess of gas especially nitrogen), and infectious agents (viruses, bacterial and fungi) may be possible causes. The successful treatment depend on the resolution of the underlying cause, as empirical treatment with antibiotics has rarely been successful. This is why a quite radical approach must be followed. Begin by submitting a water sample for quality testing. Most pet stores will do this for free or a nominal fee. Clinical examination should always include a water quality check, even if you have done so already. Water testing should be performed with a quality test kit, measuring NH4, NO2 and NO3. High ammonia levels, PH imbalances may be responsible for these signs. Oxygen concentration and quality of the filters should be determined as well. If water quality is good and there are no major imbalances, your fish should get examined to look for any sign of bacterial/fungal infection and eventually water should be treated. Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further. If this answer was helpful please let us know, this will be used to improve our service!

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