Zoas got cold during shipping.

I just got some frags and the wrong heat pack was used. I opened them up and water temp was 65*f. What is the likelyhood that they'll survive? Should I acclimate them any differently? Right now they are dripping in. They were shipped Next Day with a 6-8 hr. heat pack so I suspect they've been cold for around 18 hrs.

Thanks!!!

I signed for them at 2, acclimated for an hour so they've been in the tank for going on 2 1/2 hours now. One frag is wide open, almost all polyps are at 100%. The second frag is about 50% open to 50% and the third has just a couple starting to open. I think they'll be ok. I see no signs of bleaching.