Glad to see some pics on this thread!
... In any condition!
My tank is wrasseless, but my YT will scope my large clams all the time. It just barely touches the mantel and waits for any hiding pods to dart out then gobbles them up. Very cool to watch, a little startling at first as I thought he was tearing into my clams!But, no harm to the clams, it does make them retract for a moment but that is it.