Phil sounds like a real character himself.

"Dragon Slayer" wrote in message
...
sounds like you got a real character there Phil. IME scallops will move but
not as dramatically as you describe. also they aren't photostetic so they
tend to find a place out of the light (usually out of good viewing as well)
in the back of the tank or behind rockwork, then they will remain without
moving again as long as conditions are suitable.

kc