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it can be difficult and is likely to be most accurate in their breeding season. the males in season will develop white spots by their gills and on the edges of his fins, the females anus will protrude a bit while the males will stay slightly turned inward. the femles are likely to get fatter bellies which you will notice when looking from above. in breeding season the males will chase the females although if there are no females the males will chase other males so be careful using that one!

hope this helps

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17y ago

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