I watched my little SPilo, STealth, go after this rosie red I added to the tank today. He like just chills in the corner and wait for the rosie red to come close to him and then he tried to strike out of nowhere. And if he misses he runs to the other side of the tank and just chills and looks at me. I think he knew I was watching and he felt the pressure and missed. I dont think he misses too much cuz usually when I add feeder fish.... by the morning they are gone.