Not the corris, maybe the melanurus. You could try an arrow crab, but it is a crab and can also eat other things you don't want it to.Nothing will eat large ones, only small. Back off on feeding, syphon the ones you see when they come out, their numbers will dwindle. They are actually good for your tank as mentioned, but not when they overrun it. I don't like the ones that come waltzing out in the daytime that are thick as pencils..I take those out.