I have had a Koi for about 4-5 years who has never spawned to my knowledge and until this summer I didn't know if it was a male or female. SHE is now HUGE and I assume the lower belly swelling is from eggs. But she just gets bigger and bigger and I keep looking to see if she is still alive. We have just one other Koi who is that size but again I have no idea if it is a male or female. What if there is no male to "do the job"? I have seen other smaller Koi and the goldfish doing the chase but they leave Tiger alone.
