Hey guys new to the forum here. I am having a hard time identifying this organism and would appreciate some input as to what they could be. They are red (started as small specs and are growing quick) and have anemone like behaviors, they feed on brine shrimp and fish pellets, almost anything I place near them in fact. They are only about a centimeter diameter when fully opened. There are probably around a dozen scattered on my rockwork. Any ideas? And thanks in advance