ID Please!

[Myka]

Beanz, I'd keep an eye on it. I'm not convinced it is Corynactis sp as most (all?) species of Corynactis are temperate, and unless you got rock/corals from a temperate location, then it's unlikely to get one of these critters. Maybe if you have a Gorgonian coral. It might be Corynactis. The pic isn't clear enough to see it well, and there are a lot of little anemones that look like that. Keep an eye on it - if you notice they are popping up babies at a quick rate, then nuke it (Aiptasia methods like kalkwasser paste should work).Soapy's pic is Pseudocorynactis sp, White Ball Anemone. They aren't usually a problem, but in rare occurrences it can become invasive.