They're actually pretty cool in several ways and one of them is communication. Fatheads will swim freely with almost zero schooling tendency but when a threat is sensed they release a hormone or other chemical that causes them to bunch up. Becoming aware of the communication and observing them closely for a few years is what caused me to reconsider live feeding; I'm no longer a fan thanks in large part to a handful of lowly Fatheads years ago.
Well, I definitely want to keep them they seem to have a great personality. It's just that I don't have the capacity for over 30 of them. So I'll either rehome some of them or let them go in the creek