Your info cleared up a few things... first I think my blue leg and red Scarlett's could have done that, and second, I never knew about asterinas!!!! I have one in my tank, maybe more.... I always thought it was just a baby sand sifting star that was growing really slowly! Lol I may have found my answer! I got to get them out before them find my high-end zoa. I always let them be, thought they were detritus eaters. I would even clean around them with my mag float! lol lol. Thanks guys!!!!