Fish Facts – Can I Keep Koi & Goldfish Together?

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For some reason, there is a common myth that koi and goldfish cannot be kept together in the same pond because the goldfish will get the koi sick.

Sorry, but carp are carp. Yes, koi and goldfish are BOTH carp cousins and carry 100% of the same disease. Some viruses, such as koi herpesvirus, also known as KHV, can be carried in both koi and goldfish, but only koi will die from the virus. There can absolutely be asymptomatic koi AND goldfish carriers. If you own koi, you REALLY need to know about KHV:

Watch our video for the whole story or read about Koi Care ( vs. Goldfish Care (! For more information about pet fish health, please visit our website at If you have a sick fish and need help, call 866-FISH-VET or visit

At Aquatic Veterinary Services, fish are treated like family. Dr. Jessie Sanders – Owner/Chief Veterinarian.


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