These are palythoas...they are hardy and with improved conditions will be fine. These green ones are commonly called Button Polyps.
what am i multi specimen version photo may 01 9 59 47 am jpg 9427 - What am I??? Multi specimen version :)

It looks like a finger leather coral. With improved conditions it should make a recovery. If the tissue in the center is still dying, you might consider cutting the "fingers" off from around it and put them in some rubble or small pieces of rock to reattach.
what am i multi specimen version photo may 01 9 59 42 am jpg 9428 - What am I??? Multi specimen version :)


The green one is a green nepthia. The brown one on the top right looks to be a cabbage leather.
what am i multi specimen version photo may 01 9 59 37 am jpg 9429 - What am I??? Multi specimen version :)

I can't really tell on this one. Perhaps if you can get a clearer photo that is closer.
what am i multi specimen version photo may 01 9 59 59 am jpg 9430 - What am I??? Multi specimen version :)

In general, I would say everything that is still alive is pretty hardy (obviously). And if you can improve their water quality and provide ample flow and lighting they should recover.