I am pretty sure they are BG (more late spawners). What I don't understand is why they would only be out in deep water around brush piles running to the surface. None any other place I could find. They were in schools/groups.

One thing I have noticed is the CNBG seem to be spawning later than the BG. I wonder if that is a hot water adaptation. The ones I saw spawning in late July and again about 10 days ago were mostly CNBG. I could really see those copper bars stand out while on the bed. Those CNBG have been in the pond 15 mths and are probably 24 mths old.