+1 on the halimeda. It takes strong light, seems to do really well under 10000k or 15000k halides.The little clear guys are probably tunicates. The orange and red encrusting sponges are nice, but read up on their requirements 'cause if they die en masse, they will kill everything in your tank.
I'd like to get some more info on the particulars of collecting rock in the gulf. FWC says all collection of live rock is illegal, so how did your LFS obtain this rock? Just curious. I have a 75 FOWLR on the east coast of FL- water, LS, LR, inverts, anemones, fish all collected locally, and all my water changes are natural seawater. The LR I collected was either seeded( placed on the reef and allowed to colonize), or concrete rubble.
Make sure you don't have any caulerpa on there- you'll curse the day you put it in your tank!