I agree, most harassment I have witnessed in my tanks happens when the fish are not aware of my presence. they act like eager puppies in my presence, but when I am hidden from view, or in the dark, the seem like different creatures. I frequently switch on a flashlight only to catch something doing something I wouldn't expect. Like the time I caught an amano shrimp eating a live crystal red shrimp like corn on the cob. Amanos and CRS are supposedly compatible, but this proved otherwise to me.