This thread got me thinking. Are there any other male/female fish species that have the more obvious visual and physical markings like BG and HBG?
Maybe redears?
Whatever, that's a beautiful mount RC51.
Tilapia males can have very noticeable differences. You see them in the tank, glance away for a few minutes, and you look back and think it's a completely different fish. Flips like a light switch.