Green Star Polyps have a bright purple to reddish colored mat and very green, yellow, or light green tentacles. The mats are flat by irregular. They are robust and will spread easily. Green Star Polyps form stolons that are connected forming a mesh-like structure with all the polyps being housed in tubular calyces. There are 8 bold tentacles to a polyp that are thin and smooth. The tentacles surround a center opening, or mouth, that is often another contrasting color.The polyps are generally expanded unless an outside stimuli disturbs them, then they can retract fully.