Spawning time can be stressful to watch. When several males are chasing one tired female, they sometimes push her around. I have had one die after spawning before. Usually though, everything works out fine. If you don't want a bunch of additional fish, many on here withhold food so the fish will eat the eggs, keeping the population under control. Typically, a few are good at hiding and will survive. Finding a couple of baby fish is fun!!!!!