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How do you sex koi fish?

Updated: 11/18/2022
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12y ago

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Male Koi will have white tubercles on their gill plates and on the tops of their pectoral fins. White tubercles are basicly little white pimples. They are hard to see from the surface so the easiest way to see them is to catch them in a large net and gently run your finger along their gill plate, if its lumpy its a male, if its smooth its a female. Also, females in breeding condition will have an abdomen filled with eggs so technically she will be really fat! , Katrina

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12y ago
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Q: How do you sex koi fish?
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