Having difficulty figuring out what this is.

[Nirethell]

I know my Zoa's aren't exactly pleased with these for sure. the fluoresce a bright green in the middle. No they are not aptashia. So What in the world are these?

 

[TheEngineer]

Colonial hydroids

 

[Nirethell]

Colonial hydroids

Oh man I just looked them up.. they are only localized on this one rock in this very central location.. I'll hit them with some kalk paste. Thanks for the quick response guys!

 

[Nirethell]

Oh man I just looked them up.. they are only localized on this one rock in this very central location.. I'll hit them with some kalk paste. Thanks for the quick response guys!

So thanks again I was able to figure out it was all coming from that one frag. So I pulled the frag and I'm attempting to save the zoas coming off of it. If they live cool. If not idc I feel like I saved my tank from a terrible pest. I was able to throw the frag plug out and transplant the zoas to a new one. Here's to hoping they survive the transplant!