Well.. I had 4.. 2 jumped.. I think there was a territorial dispute during feeding... because they jumped within 2 days of each other and both approximately 1hour after I dropped food in the tank. They hang out near the top of the tank most of the time near the outflows which is about right considering they're from fast moving streams. I have all the fish in that list lol, was just making sure I wasn't doing something incredibly wrong.