I believed it from stress & give it time to ait djust to the new environment. It was open up nicely before I bring it over to your place.
nah it's definitely not dead if it was dead it would be brown like that big piece of favia that used to be alive behind it lol. Give it a few days it should be fine. If tentacles come out feed it and it's all good.
Looking better now. It better that you glue it on a rock away from the sand that would help