true. my sens and delhezi seem to be very active. the del is still very small so he does hide alot but its not unusual to see him cruising around. my retro hides all the time! i really like the way he looks but if he is not hiding behind something he's lying on the bottom doing his best wolffish imitation. i thought of just removing all cover for my but then the fish still probably wouldn't be an active swimmer. just lie there and be miserable.