They are not dead. Acclimate for about an hour or two and put them in the tank. Do NOT put the water in the bags into your tank.
Check them for external parasites. Look for little brown spiders. Look for little FLAT as a piece of paper worms that are brown/tan and about 3- 6mm long x 2 - 3mm wide. Those are flat worms. Check them for white spots on the polyps - zoa pox.
Do some google searches for zoa predators and saltwater pests that host on corals.