hi all, i,m very freaked out right now. i have lost 4 of my bobs in the last 3 days. (also 2 brittlestars) when i pull them out they look like they have been snacked on. mostly missing legs. the legs don't seem to be in the sand or anywhere in the tank. all i have in the tank is the bobs, a coulpe of black brittle stars and a few clams (or oysters, i don't know the difference ) i do feed them live shrimp, but then again, that's what i've been feeding them all along. the other crazy thing is that the brittle stars are also missing limbs. first i pulled out a half mangled brittle star and assumed one of the bobs got hungry. the next day 1 of the bobs was dead, and i assumed that this was the one that ate the starfish, and it didn't agree with him. his legs looked thrashed, but i thought that it was from the other brittle star. the next day i pulled out 2 more bobs one of them alive but missing all it's legs, he died abot 2 hours later. i also pulled out the other brittle star, it was just a body and 3 stumps. the next day i pulled out another bob. it looked just as bad as the others. is something in my tank eating all my bobs? is it a virus or something? i only have 2 more bobs left. help!