Dekay, it seems to just be the green ones that are a problem, all others seem to be harmless (that being said there are exceptions to everything). Unless you know it's eating or harming something in your tank I'd leave it in. I used to have hundreds of the black/white ones in my refugium, they seemed harmless enough, I had a ton of amphipods and copepods as well so the little stars weren't hurting that population.
Doug
|