When I first saw it I thought it was a nudi as well. But I couldn't find anything that looked like him. I am positive now it is a Stomatella, as I found some that ;ook exactly like this one. The star I was never worried about. I first noticed just the tip of one leg weeks ago, thought it was bristle worm at first. But each night it got longer, and then started multiplying. Last night was just the first night I was able to see the entire animal come out of that sponge.