I haven't seen one colored or shaped like yours. And I can't tell for certain if the darker parts are showing skeleton and are in good shape, but it looks like a newly introduced but not acclimated plate coral should. The variants I am familiar with have white skeletons and I don't see that in your pic. It's normal for tentacles to retract and you can see the ridges of the skeleton clearly, but with colored tissue tightly covering it. This is normal in my experience. If tissue is flaking off, you have a problem. But yours looks fine to me, or I can't see any obvious sign a of distress. Give it a few dauus and see if responds to being fed. If you're stlll concerned email DD. They should treat you right. Good luck with it.