Oh that happened to me too..I found him next to my anenome broken in half-not eaten-just broken. I do have a brittlestar, but why would he not eat him, why just kill him?? My other shrimp is doing fine and I've seen him side by side with the star..I think there is another culprit..but what could it be? I have 2 small clowns, 1 anenome, 1 pep.shrimp(now) 2 tiny hermits, 1 brittlestar..who done it??? LOL