I have a @3" across bubble anemone and a metallic hammer in my 50 gallon. The hammer has been in there for at least a month almost two. and the anemone has been in the tank over a month. They look healthy most of the time occasionally on certain days one or both will be more withdrawn than normal. But they come back looking just fine the next day (this happens especially at night.) But today they are both showing huge bubbles on there bodies (see pics) The red bubble is completely withdrawn and only a bubble is showing. Is this a reason for concern? And if so what is too be done? Thank you for your time.