About eight years ago some of my rose BTA's started exhibiting deformed tentacles. At first I thought it might be cancer, but the condition doesn't seem to progress. Many of the deformed tentacles appear to have a mouth. It opens when I feed the tank, and it even appears to have mesentery filaments. It hasn't effected the anemone's longevity - the Anemone pictured is at least six years old. I have another color morph anemone in the tank that isn't effected. Anyone have an idea what's going on? Should I euthanize the effected animals?