I have been breeding a few different fishes some die off but yesterday I noticed that if I had sickly then dead fish in the tank the health bar was showing as brown , I put dead ones in garbage can but if I thought an undeveloped baby was sickly I also put into the G'can,I was breeding at different times Golden Spotanus/Orange spotanus and all 11 died aprox. at 13 weeks. so it must be some breeds are just to weak to breed together (more research needed)charlee