I stocked FHM and CNBG in February.. Noticed lots of little fry on the shoreline the other .. Not sure what type of fish but sure excited to see them
After observing for the first year you will be able to distinguish between the adult FHM and BG fry pretty easily. They swim and act different.
I would relate the way a FHM swims more like a shark or catfish. Moving most of the time with more random movements than the BG. I relate the FHM swimming more like an active puppy dog acts. The BG I would relate it's actions more like a cat. Measured, moves forward, inspects, moves again, inspects. Methodical. FHM random and more erratic.
When seeing the two schools feeding together on sinking pellets in shallow water, the FHM will go in Pell mell. The small similar size BG will be on perimeter more timid (adult FHM vs BG fry)
I suspect you are seeing FHM fry.