Saturday, August 15, 2009

Surface Flapping

I have about 20 Koi and all appear healthy. One however is head down by the surface flapping its tail continuously. Is this part of mating or do you think it could be ill. - Paul

It sounds like your Koi has a swim bladder problem. Koi use their swim bladders to maintain buoyancy and for balance. It can get damaged by physical trauma or by an infection. Some Koi never do fully heal and have problems the rest of their lives.

Here is a video clip of someone that had a Cichlid with a swim bladder problem and they used a small piece of styrofoam to act as an artificial one. I don't know whether or not if this would work for a Koi.

Here's it after they got the correct buoyancy:

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