We've created this poster to show visually what you can expect to see with a variety of the most common parasites and diseases that affect koi and pond fish. See other articles on the site about what to do if you spot any of them...
Why quarantine koi before introducing them into your pond? The quarantine process will allow the new koi time to rest and recover from the stress of handling, moving and transport. Stress weakens its immune system and a koi with a weakened immune system is highly prone to...
Parasites feed on various parts of the Koi, normally the mucus layer or the dermal layer of the skin, or within the bloodstream and flesh. All parasites need sustenance to enable them to live and reproduce and they reproduce at truly alarming rates. An adult parasite...
Diagnosis If you notice your Koi behaving unusually it is usually a sign that there is something wrong in the pond. They may be 'Flashing' or Flicking' off the pond bottom or some other object, indicating that they have an 'itch' or something is bothering them. If we have an...