Zoa polyp missing

[TheRockPlayz]

I’ve had this zoa for about 2 months, it was the first thing I put in after cycling my tank (3mo) and it has been great and resilient through all the learning curves. Today I wake up and notice that one of the polyps is gone and left with just a hole. I don’t have anything that should be eating it and I haven’t added anything new into the tank for the last month since my fish had ich and been in quarantine. I have 2 turbo snails about 5 blue leg hermits a clown and a hippotang (1.25in approx) I’ve added phytoplankton (1 once a day for the last 7 days or so) and copepods. There’s this weird clear line on the side of my coral plug the zoas came on that I don’t remember. There’s plug does keep getting moved away from the rock as seen in the photo. Any ideas on why this zoa seems completely gone, parasite or someone eating it?

 

[logibear]

FYI no photo actually posted

 

[TheRockPlayz]

I’ve had this zoa for about 2 months, it was the first thing I put in after cycling my tank (3mo) and it has been great and resilient through all the learning curves. Today I wake up and notice that one of the polyps is gone and left with just a hole. I don’t have anything that should be eating it and I haven’t added anything new into the tank for the last month since my fish had ich and been in quarantine. I have 2 turbo snails about 5 blue leg hermits a clown and a hippotang (1.25in approx) I’ve added phytoplankton (1 once a day for the last 7 days or so) and copepods. There’s this weird clear line on the side of my coral plug the zoas came on that I don’t remember. There’s plug does keep getting moved away from the rock as seen in the photo. Any ideas on why this zoa seems completely gone, parasite or someone eating it?

 

[TheRockPlayz]

FYI no photo actually posted

Thank you, I just replied to the original post with photos

 

[ColorMeGone]

Looks like it just retreated some. They can do that if not happy. What are your tanks parameters ?