My Argentea flips out when he sees his reflection and in turn causes a giant sand storm. He also likes to pick up medium sized rocks or gravel and spit them out on the front glass to get my attention.
have 2 O's that like to swim up real fast then jolt back down once they hit the surface. the tank is about 3 feet from the foot of the bed. ive woken up at least three times this week from them doin it so fast the water kicks up and at me.