[Danny Boy]

I have a fish with cloudy white eyes, one considerably worse than the other. What would be your suggestions for best course of action?

[ogawa only]

got any pics ??

[Danny Boy]

Please find attached pictures of fish with white eye. Your suggestions for treatment would apreciated. The blood in the left eye only appeared when it got stress otherwise it was white.

[trickydicky]

Found this on the net danny boy

Koi4u - Koi care - Eye problems

hope it helps

[Bandit6]

Hi I would have said that is carp pox and there is no treatment for this it will go as the water warms up
have a read of this http://www.koiquest.co.uk/Cpox.pdf

[markf1fan]

Originally Posted by Bandit6

Hi I would have said that is carp pox and there is no treatment for this it will go as the water warms up
have a read of this http://www.koiquest.co.uk/Cpox.pdf

sorry but i would disagree with it being carp pox. carp pox is white in looking and i have never seen it on the eye. it looks to me as the fish has some other kind of prob. i will leave this one to ogawa for an answer. good luck mate with the fish. mark

[Bandit6]

I have seen Carp pox cover a Koi's eye before and have blood spots in it just like we are seeing here,other than that it could be a eye parasite but that would be very rare and highly unlikely.

[trickydicky]

Carp Pox May Have Been Around The Koi's Eye But It Could Have Had A Parasitic Eye Infection Too Due To Bad Water Conditions

[markf1fan]

Originally Posted by Bandit6

I have seen Carp pox cover a Koi's eye before and have blood spots in it just like we are seeing here,other than that it could be a eye parasite but that would be very rare and highly unlikely.

was only giving my opinion, maybe i know nothing lol.

[trickydicky]

I do wish people actually read links


Parasitic infection

Although not an eye infection as such, a fish’s reaction to a parasitic infection is normally increased production of the protective slime coat. In severe parasitic infection the eyes may also appear clouded over.







When the whole body of a fish is turning grey-white, the eyes are clouded over and it is hanging listlessly close to the surface or waterfall, it is an advanced state of parasitic infection and the prognosis is very poor. Antiparasitic treatment should start immediately. I would not recommend treatment in such a case with Potassium Permanganate or a Formalin-based medication, because in such cased the chances are good that the gill may already be damaged. Salt at 0.3 percent and Seponver Plus may be more appropriate.

Bacterial infection

Cloudy eye can also be caused by a bacterial infection. In such cases, only a part of the eye, or the entire surface or lens of the eye takes on a cloudy, opaque appearance. Bacterial infection of the eye can originate internally or from the outside. If the origin of the infection is internal, the cloudiness will appear to move from deep inside, to the surface of the eye. In cases of a more widespread internal infection, the eyes may be protruding or bulging or have a grayish film over the eyes and protruding. The reason for this is the bacterial damage to other organs like kidney and liver, causing interruption of the osmoregular process.

If there is a build-up of mucus on the outer surface of the eye, one of the probable causes may also be a bacterial infection. External bacterial infection can manifest itself through the following symptoms:


Translucent film over the lens of the eye
Clear to translucent film over the lens of the eye and part of the body
The iris becomes cloudy
Swelling and redness around the outside of the eye








Treatment for internal bacterial infection is either medicated food or injections. Please note that an injection against Gram Negative Bacterial infection should be administered. Treatment against external bacterial infection is much less complicated. A series of Salt or Potassium dips are normally sufficient to clear the symptoms.
It may however also be due to problems with the water quality, or a combination of both bacterial infection and poor water quality.

Poor water conditions

Where the entire surface or lens of the eye takes on a cloudy, opaque appearance, it is most commonly caused by poor water conditions. Like in all cases of investigating the cause of a problem, the first step will be to conduct tests on the water quality. Excess mucus or a film over the eyes will develop in cases of unacceptable levels of ammonia, nitrite and nitrate. Improving water conditions usually cures cloudy eyes.






Monitor the fish closely for the following week, because the poor water conditions may have triggered a bacterial/parasitic infection