I may be way offbase here....or hallucinating...
It appears there are a bunch of protopalys mixed in between your rpes. Or do you know that and are just talking about the brownish red things? Are you sure they are zoanthus gigantus?? It is hard to tell.......they almost dont look like it.
It also appears to me you may have flatworms, although they dont appear tio be any of the bad guys that i am familiar with. typically the white/lightish colored flatworms are predators of tiny pods, although there are countless species of flatworms so who knows. I havent as of yet heard of any zoanthid eating flatworms but I have no doubt they probably exist
As far as specifically what is wrong?? They look both bleached a touch as well as stretching for light which is of course a contradiction.........if you have others of rthe exact same thing looking better in a different part fo the tank....then the first thing I would do is move them there and see what happens.
If those are indeed flatworms as i think they are...the first thing I would do I see if they are vulnerabkle to slaiferts flatworm exit.....and if so, take appropriate safety precautions and use the stuff to get rid of them, or go buy that good camera with the macro lens you want.......and see if Leslie H can maybe tell you what youve got.
The rpe like things dont look all that awful, but if you are expecting those other polyps mixed in with them to ever look like the rpe's.......dont think it will ever happen. The protos do look like they are getting a little too much light. The rpe liek things just might be a less desirable variation of RPE than you are used to seeing, and may simply be different than the ones you think look good you have lower in the tank....unless of course you know they are for sure the same
