Easiest way is to see who is chasing who during spawning. I successfully
sexed all but one fish this way. Someone wrote here once that koi spawn once
a season? Im not sure about that based on observation of ours. Goldfish on
the other hand spawn frequently.
sandra

"MISSYMAGICGIRL" wrote in message
...
I haven't seen a fry yet with my fish. I believe they are old enough to
spawn.
I tri tried to sex them but it's hard.


Sacha