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Dr. Andy
Dr. Andy, Medical Director
Category: Pet
Satisfied Customers: 550
Experience:  2003 Graduate
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I also have a Koi fish with a swollen belly. It is not as big

Customer Question

I also have a Koi fish with a swollen belly. It is not as big as described by the person who cited a similar ordeal on his Koi. I was able to catch that fish with my hand while it was eating some pellet food. could it be possible that it is pregnant? Its scales are not protruding but its anus is a little distended. could it be the same disease you spoke about?
Submitted: 4 years ago.
Category: Pet
Expert:  Joan replied 4 years ago.


My name is Joan and I am a Vet Tech with Special interest in Fish. I need to ask a few questions.

Is the Koi in a Tank or a Pond?

Is the Koi having problems swimming?

Do you have a Filtration system?

What type of food are you feeding?