No polyp extension so far. I even got out of bed at 2am to check. LOL All I found was a HUGE bristleworm. If there are polyps, they are extremely tiny. When I bought it at the store it looked like it was dying. So I took a chance on it, hoping I could nurse it back. After dipping it in iodine, it looked a little worse. However, I could see some of the mouths opening up after dipping it. Maybe a mod could move this threat to the right area....please