It was fine this morning, but I went out too look again and all of its duster was GONE. He still comes out some, as if hes trying too spread it out. There is no sign of it (that I can find) in the aquarium. Is this a normal shed and regrow thing or is it terminal? Did he do it or did something else do it? I have a red coris wrasse, a coral beauty angel, and a pair of maroon clowns in with it. none of them is large enough (i think) too bite the thing off. there is jagged edges or anything. The whole filter is just missing.