I have a Green Bubble or Bulb Anenome. I'm new to there behaviors. My tank is well established and chemistry right on. Most of the time it's full, white and pretty then every so often it will pucker up and stay that way for a while with it's mouth open then go back to being full and healthy. Is this normal? It seems to be expelling waste during this time with the bonded clown fish helping it. Also it's basal disc is stretched out like it is either moving. Could it be splitting?