Yesterday i looked at my girlfriends tank and noticed something kinda odd. Her sand sifting seastar was missing 2 and a half legs. It looked as though either something was eating it or it was just rotting away while still alive. the only 2 inverts in her tank that would even come to mind as a possibility of eating it is 2 little boxer crabs. I highly doubt that it was them that did the damage to the star because the day before the star had all of its appendages. Other than that the only fish in the tank are a black clownfish, a pink spot gobey, and a tiger jawfish. I dont think it is any hitchhiker that is doing this to the star either because all of her live rock came from my tank and i never had any issues with my star. So i guess it is a disease of some sort?? I then checked all the parameter and everything checks out ok. Has anyone ever seen this happen to a sand sifting sea star? The thing that is really striking me as being odd is that if it is a disease how fast it ran its coarse. two days ago the star had all of its legs and the next day two and a half have just seemed to rot off!