you know, that's weird. my sebae clown plays in the hairy mushrooms during the day (lights on) but at night (lights out) he will bite down on the corner of the rock or glass and just start paddling away! I mean, he digs a hole. Then he bobs up and down all night in the hole. Then daylight, hes back on the shrooms. He's 'bout a goofy fish, eh?