Are they all the ones sitting on the sand bed? 5 of them?? What kinds of coral were they supposed to be? They certainly do not look very promising, but depending on the coral, some can go thru something like that and still pull through. I have been shipped corals that have arrived DOA and you could tell from the water that something had gone wrong, murky and smelly! I would contact your seller and let them know that things are still not opening just to cover yourself and to ensure replacement if they do not open. Can you see anything living on the surface? I cannot tell from the photos.