Okay I will do that. I dont think it's a majano...( though the other side of their tank was clutters with them) out of water it shrivels up like a mushroom and doesnt have the polyp look. It also has never shown any tentacles like a majano.Looks like a green discomia or pest Mojano anemometer. You should be able to scrape it off with your thumb nail into a small container with sw and rubble or frag plugs or discs. It will re attach on its own with low flow.