Speaking of diversity in shiners and other species, I found an old post from DonoBBD. He has pictures of some type of chub which he calls a 'creek chub' which reproduces in his pond and has taken to pellets. He indicates in this post his emerald shiners DO reproduce in his pond and he has other shiners reproducing as well.

In other posts he shows pictures of his healthy YP populations and also his rainbows.

He hasn't been by the forum much looking at his past posts but has a great pond setup with unique things happening. Hopefully he stops by again.

See pictures and info here:

https://forums.pondboss.com/ubbthreads.php?ubb=showflat&Main=40132&Number=521920#Post521920