We all know these little buggars. They are less than half an inch, and they reproduce through fission, and they are predators of corals. I have found 3 in my tank, through random luck. Some corals are starting to show wear, and I cannot find them durring the day, or with a flashlight at night. I cant use harlequins, because I have 2 sand sifting starfish in the tank that I LOVE, and i beleive they dont affect the sand bed too much as there is about 6 inches in a 120 gallon. Any ideas? ANything would be greatly appreciated