Not the best picture possible, but i believe i have total 2 male Red Gold's and one female, with the female being pictured here. I purchased a separation net, just in case and shes doing fine.
Signs that show this may be true
- Other fish were following her around, poking at her
- Red bottom area, getting darker
- More of a "boxy" stomach area
Tbf, most babies get eaten so you shouldn't get too too many, but the other option, and what I usually do, is to keep only males. No babies and no fighting.