The beadlet anemone, or the Actinia equine, is a common sea anemone found on rocky shores near the United Kingdom. What is interesting about the beadle anemone, like most cnidaria, it lacks specific immune cells. To maintain tissue integrity, colonial forms have to rely on their capacity of self/nonself discrimination to rapidly detect approaching allogeneic cells as foreign and to eliminate them. Also, since cnidarians are colonized by complex bacterial communities and in many cases are home to algal symbionts, successful growth means for cnidarians to be able to distinguish between beneficial symbionts and pathogenic intruders. This is basically, the only immunity they have.