I've never had clove polyps in my tank and I've had this going for years. Today as I was taking some pics I noticed these coming up right under a green acro frag. Can anyone ID ??? Look directly under the green acro frag plug
Or a worm or aptesia can you post a better photo if its a worm or a feather duster it will hide the second you get close to it try touch it see if it retracts or closes
If it is then it is a invasive species and i would recommend removing the couple of polyps before they take over and sting other corals i would only keep them on a "island" rock in middle of the sand etc so i can frag it easily if it gets to big