Haha, I know what you mean, CK, about the aggressive males! The fish I got from Pond Kid are that way, I think I remember that there are 3 females and 3 males. My other fish are slightly smaller and much smaller, and the big ones are the chasers and spawners. However, I got my female "Red Lips" into the goldfish pond over a month ago, and she has spawned in there, too, and now Shubie is in there, also a female. Not seen her spawn, so likely spawned in the koi pond. There always seems to be a thread opening up someone worried about the crazy males chasing those females! I would guess that's how my large goldfish and Asagi koi got into the hyacinth net, trying to escape. The big yellow koi is definitely a female, and she was in the net for over a week before I realized it, then moved the net and found her. She was doing a good (bad?) job of eating roots as the hyacinth in that net are still looking poorly.
Hyacinths in the goldfish pond, without a net, are doing super, though, so obviously the goldfish do not gobble the roots like the koi.