I'm not trying to have a reef tank here..I have some pretty aiptasia that came in on my live rock and I think its beautiful. Other than stinging corals and taking over should I have any concerns when it comes to fish? Can they hurt my fish? This is in my puffer & eel tank...I do have some Eagle Eye Zoanthids in here also. I know, can it be, puffers and zoanthids can coexist? :) If it can sting my puffers then that's probably why I caught them making weird facial expressions the other day..cracked me up..but I don't want them to get hurt.