Will my zoo's comeback to life

[JaiWiz]

I had a matted filefish nip at some zoo's i have removed them from that tank and put them in a coral tank. but he nipped at them so bad that i fear they will not comeback can anyone shed some light on this for me please. the encrusting base is still there and it just looks like the polyps have closed right up and shrunk down. i gope they comeback they were beautiful