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How can I determine the sex of a goldfish?

The only clues I heard so far were to wait for spawning season, or try to see the shape of the vents, but this get a little trickier if you´re not experienced with them.

5

Some differences

  • The male gold fish usually chase the female ones. If you notice a fish chasing the other, then the fish chasing is probably a male while the fish that is being chased is a female.

The best way is to check during spawning season,

  • The male will develop white spots on their gill covers known as breeding tubercles. Not all male exibit this but most of them do.

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