The Green Mouth Moon Polyp (Palythoa sp.) is also known as the Zoanthid Green Mouth Button Polyp. It is not a plant. It is a marine animal – a zoanthid – a Palythoa Coral.
The Green Mouth Moon Polyp can be cream, white, brown, or yellow, with a green centre, which is its mouth. It lives in a colony of many polyps (but it looks like just one single organism). Its polyps are flat circles with rimmed tentacles. The tentacles are short and shaped like a knob. They are connected to a mat, called the coenenchyma.